diff --git a/.gitignore b/.gitignore
index debce4dd2..516970e91 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ build/
 tags
 .DS_Store
 Makefile
+node_modules/
diff --git a/.jshintrc b/.jshintrc
new file mode 100644
index 000000000..f7daa6924
--- /dev/null
+++ b/.jshintrc
@@ -0,0 +1,19 @@
+{
+  // Environments
+  "browser": true,
+  "devel": true,
+  "es5": true,
+  "worker": true,
+
+  // Enforcing
+
+  // Relaxing
+  "boss": true,
+  "funcscope": true,
+  "globalstrict": true,
+  "loopfunc": true,
+  "maxerr": 1000,
+  "nonstandard": true,
+  "sub": true,
+  "validthis": true
+}
diff --git a/external/builder/builder.js b/external/builder/builder.js
index d4e47fc63..4dc9f2655 100644
--- a/external/builder/builder.js
+++ b/external/builder/builder.js
@@ -1,3 +1,8 @@
+/* jshint node:true */
+/* globals cp, ls, test */
+
+'use strict';
+
 require('../shelljs/make');
 var fs = require('fs'),
     path = require('path'),
@@ -30,7 +35,7 @@ function preprocess(inFilename, outFilename, defines) {
   var writeLine = typeof outFilename === 'function' ? outFilename :
                                                       function(line) {
     out += line + '\n';
-  }
+  };
   function include(file) {
     var realPath = fs.realpathSync(inFilename);
     var dir = path.dirname(realPath);
diff --git a/external/crlfchecker/crlfchecker.js b/external/crlfchecker/crlfchecker.js
index 50522475e..f36894934 100644
--- a/external/crlfchecker/crlfchecker.js
+++ b/external/crlfchecker/crlfchecker.js
@@ -1,5 +1,9 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* jshint node:true */
+/* globals cat, echo, exit, ls */
+
+'use strict';
 
 function checkIfCrlfIsPresent(files) {
   var failed = [];
diff --git a/make.js b/make.js
index 9a96f796e..f327a3b85 100644
--- a/make.js
+++ b/make.js
@@ -1,5 +1,7 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* jshint node:true */
+/* globals cat, cd, cp, echo, env, exec, exit, find, ls, mkdir, mv, process, rm, sed, target, test */
 
 'use strict';
 
@@ -39,7 +41,7 @@ var DEFINES = {
 target.all = function() {
   // Don't do anything by default
   echo('Please specify a target. Available targets:');
-  for (t in target)
+  for (var t in target)
     if (t !== 'all') echo('  ' + t);
 };
 
@@ -611,8 +613,9 @@ target.chrome = function() {
     exit(1);
   }
 
+  var manifest;
   try {
-    var manifest = JSON.parse(cat(browserManifest));
+    manifest = JSON.parse(cat(browserManifest));
   } catch (e) {
     echo('Malformed browser manifest file');
     echo(e.message);
@@ -971,6 +974,29 @@ target.lint = function() {
   crlfchecker.checkIfCrlfIsPresent(LINT_FILES);
 };
 
+//
+// make jshint
+//
+target.jshint = function() {
+  cd(ROOT_DIR);
+  echo();
+  echo('### Linting JS files (this can take a while!)');
+
+  var LINT_FILES = ['make.js',
+                    'external/builder/',
+                    'external/crlfchecker/',
+                    'src/',
+                    //'web/*.js',
+                    //'test/*.js',
+                    //'test/unit/*.js',
+                    //'extensions/firefox/*.js',
+                    //'extensions/firefox/components/*.js',
+                    //'extensions/chrome/*.js'
+                    ];
+
+  exec('jshint --reporter test/reporter.js ' + LINT_FILES.join(' '));
+};
+
 //
 // make clean
 //
diff --git a/src/api.js b/src/api.js
index 2883d2ec5..148e0efaf 100644
--- a/src/api.js
+++ b/src/api.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals CanvasGraphics, combineUrl, createScratchCanvas, error, ErrorFont, Font, FontLoader, globalScope, info, isArrayBuffer, loadJpegStream, MessageHandler, PDFJS, PDFObjects, Promise, StatTimer, warn, WorkerMessageHandler */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -282,7 +283,7 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
           promise.reject(error);
         else
           promise.resolve();
-      };
+      }
       var continueCallback = params.continueCallback;
 
       // Once the operatorList and fonts are loaded, do the actual rendering.
@@ -383,7 +384,7 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
 
       var continueWrapper;
       if (continueCallback)
-        continueWrapper = function() { continueCallback(next); }
+        continueWrapper = function() { continueCallback(next); };
       else
         continueWrapper = next;
 
diff --git a/src/bidi.js b/src/bidi.js
index 5eb66bfd9..568d226f2 100644
--- a/src/bidi.js
+++ b/src/bidi.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals PDFJS */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -68,11 +69,11 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
   ];
 
   function isOdd(i) {
-    return (i & 1) != 0;
+    return (i & 1) !== 0;
   }
 
   function isEven(i) {
-    return (i & 1) == 0;
+    return (i & 1) === 0;
   }
 
   function findUnequal(arr, start, value) {
@@ -146,8 +147,8 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
   function bidi(str, startLevel) {
     var isLTR = true;
     var strLength = str.length;
-    if (strLength == 0)
-      return new BidiResult(str, ltr);
+    if (strLength === 0)
+      return new BidiResult(str, isLTR);
 
     // get types, fill arrays
 
@@ -180,7 +181,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
     //  if there are no rtl characters then no bidi needed
     //  if less than 30% chars are rtl then string is primarily ltr
     //  if more than 30% chars are rtl then string is primarily rtl
-    if (numBidi == 0) {
+    if (numBidi === 0) {
       isLTR = true;
       return new BidiResult(str, isLTR);
     }
diff --git a/src/canvas.js b/src/canvas.js
index 57861a940..cc6215a35 100644
--- a/src/canvas.js
+++ b/src/canvas.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals ColorSpace, DeviceCmykCS, DeviceGrayCS, DeviceRgbCS, error, FONT_IDENTITY_MATRIX, IDENTITY_MATRIX, ImageData, isArray, isNum, isString, Pattern, TilingPattern, TODO, Util, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -238,7 +239,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
           buf = imgArray[imgArrayPos++];
           mask = 128;
         }
-        if (!(buf & mask) == inverseDecode) {
+        if (!(buf & mask) === inverseDecode) {
           buffer[bufferPos] = 0;
         }
         bufferPos += 4;
@@ -932,7 +933,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
         var lineWidth = current.lineWidth;
         var a1 = current.textMatrix[0], b1 = current.textMatrix[1];
         var scale = Math.sqrt(a1 * a1 + b1 * b1);
-        if (scale == 0 || lineWidth == 0)
+        if (scale === 0 || lineWidth === 0)
           lineWidth = this.getSinglePixelWidth();
         else
           lineWidth /= scale;
diff --git a/src/colorspace.js b/src/colorspace.js
index f30c50578..116f55e76 100644
--- a/src/colorspace.js
+++ b/src/colorspace.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals error, info, input, isArray, isDict, isName, isStream, isString, PDFFunction, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -240,7 +241,7 @@ var ColorSpace = (function ColorSpaceClosure() {
       return true;
     }
     for (var i = 0, ii = decode.length; i < ii; i += 2) {
-      if (decode[i] != 0 || decode[i + 1] != 1)
+      if (decode[i] !== 0 || decode[i + 1] != 1)
         return false;
     }
     return true;
@@ -1288,7 +1289,7 @@ var LabCS = (function LabCSClosure() {
       this.bmin = -100;
       this.bmax = 100;
     }
-  };
+  }
 
   // Function g(x) from spec
   function fn_g(x) {
diff --git a/src/core.js b/src/core.js
index 822175f5d..e87c10380 100644
--- a/src/core.js
+++ b/src/core.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals assertWellFormed, calculateMD5, Catalog, error, info, isArray, isArrayBuffer, isDict, isName, isStream, isString, Lexer, Linearization, NullStream, PartialEvaluator, shadow, Stream, StreamsSequenceStream, stringToPDFString, TODO, Util, warn, XRef */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -76,7 +77,7 @@ function getPdf(arg, callback) {
         calledErrorBack = true;
         params.error();
       }
-    }
+    };
   }
 
   xhr.onreadystatechange = function getPdfOnreadystatechange(e) {
@@ -156,7 +157,7 @@ var Page = (function PageClosure() {
     get rotate() {
       var rotate = this.inheritPageProp('Rotate') || 0;
       // Normalize rotation so it's a multiple of 90 and between 0 and 270
-      if (rotate % 90 != 0) {
+      if (rotate % 90 !== 0) {
         rotate = 0;
       } else if (rotate >= 360) {
         rotate = rotate % 360;
diff --git a/src/crypto.js b/src/crypto.js
index 142575826..c643e8276 100644
--- a/src/crypto.js
+++ b/src/crypto.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals bytesToString, DecryptStream, error, isInt, isName, Name, PasswordException, stringToBytes */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -373,7 +374,7 @@ var AES128Cipher = (function AES128CipherClosure() {
     this.buffer = buffer;
     this.bufferLength = bufferLength;
     this.iv = iv;
-    if (result.length == 0)
+    if (result.length === 0)
       return new Uint8Array([]);
     if (result.length == 1)
       return result[0];
@@ -553,7 +554,7 @@ var CipherTransformFactory = (function CipherTransformFactoryClosure() {
     this.algorithm = algorithm;
     var keyLength = dict.get('Length') || 40;
     if (!isInt(keyLength) ||
-      keyLength < 40 || (keyLength % 8) != 0)
+      keyLength < 40 || (keyLength % 8) !== 0)
       error('invalid key length');
     // prepare keys
     var ownerPassword = stringToBytes(dict.get('O'));
@@ -618,7 +619,7 @@ var CipherTransformFactory = (function CipherTransformFactoryClosure() {
   function buildCipherConstructor(cf, name, num, gen, key) {
     var cryptFilter = cf.get(name.name);
     var cfm;
-    if (cryptFilter != null)
+    if (cryptFilter !== null && cryptFilter !== undefined)
       cfm = cryptFilter.get('CFM');
     if (!cfm || cfm.name == 'None') {
       return function cipherTransformFactoryBuildCipherConstructorNone() {
diff --git a/src/evaluator.js b/src/evaluator.js
index f6228ef18..aff314f4e 100644
--- a/src/evaluator.js
+++ b/src/evaluator.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals assert, assertWellFormed, ColorSpace, Dict, Encodings, error, ErrorFont, Font, FONT_IDENTITY_MATRIX, fontCharsToUnicode, FontFlags, IDENTITY_MATRIX, info, isArray, isCmd, isDict, isEOF, isName, isNum, isStream, isString, JpegStream, Lexer, Metrics, Name, Parser, Pattern, PDFImage, PDFJS, serifFonts, stdFontMap, symbolsFonts, TilingPattern, TODO, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -542,7 +543,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           fnArray.push(fn);
           argsArray.push(args);
           args = [];
-        } else if (obj != null) {
+        } else if (obj !== null && obj !== undefined) {
           args.push(obj instanceof Dict ? obj.getAll() : obj);
           assertWellFormed(args.length <= 33, 'Too many arguments');
         }
@@ -796,7 +797,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           }
 
           args = [];
-        } else if (obj != null) {
+        } else if (obj !== null && obj !== undefined) {
           assertWellFormed(args.length <= 33, 'Too many arguments');
           args.push(obj);
         }
@@ -1010,7 +1011,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
       var result = [];
       for (var j = 0, jj = glyphsData.length; j < jj; j++) {
         var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
-        if (glyphID == 0)
+        if (glyphID === 0)
           continue;
 
         var code = j >> 1;
diff --git a/src/fonts.js b/src/fonts.js
index 7285cb879..3cdd8a578 100644
--- a/src/fonts.js
+++ b/src/fonts.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals assert, bytesToString, CIDToUnicodeMaps, error, ExpertCharset, ExpertSubsetCharset, FileReaderSync, globalScope, GlyphsUnicode, info, isArray, isNum, ISOAdobeCharset, isWorker, PDFJS, Stream, stringToBytes, TextDecoder, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -507,7 +508,7 @@ var FontLoader = {
 
       // Add the font to the DOM only once or skip if the font
       // is already loaded.
-      if (font.attached || font.loading == false) {
+      if (font.attached || font.loading === false) {
         continue;
       }
       font.attached = true;
@@ -2425,7 +2426,7 @@ var Font = (function FontClosure() {
     this.encoding = properties.baseEncoding;
 
     this.loading = true;
-  };
+  }
 
   var numFonts = 0;
   function getUniqueName() {
@@ -2438,7 +2439,7 @@ var Font = (function FontClosure() {
       array[i] = str.charCodeAt(i);
 
     return array;
-  };
+  }
 
   function arrayToString(arr) {
     var str = '';
@@ -2446,16 +2447,16 @@ var Font = (function FontClosure() {
       str += String.fromCharCode(arr[i]);
 
     return str;
-  };
+  }
 
   function int16(bytes) {
     return (bytes[0] << 8) + (bytes[1] & 0xff);
-  };
+  }
 
   function int32(bytes) {
     return (bytes[0] << 24) + (bytes[1] << 16) +
            (bytes[2] << 8) + (bytes[3] & 0xff);
-  };
+  }
 
   function getMaxPower2(number) {
     var maxPower = 0;
@@ -2469,26 +2470,26 @@ var Font = (function FontClosure() {
     for (var i = 1; i < maxPower; i++)
       value *= 2;
     return value;
-  };
+  }
 
   function string16(value) {
     return String.fromCharCode((value >> 8) & 0xff) +
            String.fromCharCode(value & 0xff);
-  };
+  }
 
   function safeString16(value) {
     // clamp value to the 16-bit int range
     value = value > 0x7FFF ? 0x7FFF : value < -0x8000 ? -0x8000 : value;
     return String.fromCharCode((value >> 8) & 0xff) +
            String.fromCharCode(value & 0xff);
-  };
+  }
 
   function string32(value) {
     return String.fromCharCode((value >> 24) & 0xff) +
            String.fromCharCode((value >> 16) & 0xff) +
            String.fromCharCode((value >> 8) & 0xff) +
            String.fromCharCode(value & 0xff);
-  };
+  }
 
   function createOpenTypeHeader(sfnt, file, numTables) {
     // Windows hates the Mac TrueType sfnt version number
@@ -2514,7 +2515,7 @@ var Font = (function FontClosure() {
 
     file.file += header;
     file.virtualOffset += header.length;
-  };
+  }
 
   function createTableEntry(file, tag, data) {
     // offset
@@ -2540,7 +2541,7 @@ var Font = (function FontClosure() {
                       string32(offset) + string32(length));
     file.file += tableEntry;
     file.virtualOffset += data.length;
-  };
+  }
 
   function getRanges(glyphs) {
     // Array.sort() sorts by characters, not numerically, so convert to an
@@ -2569,7 +2570,7 @@ var Font = (function FontClosure() {
     }
 
     return ranges;
-  };
+  }
 
   function createCmapTable(glyphs, deltas) {
     var ranges = getRanges(glyphs);
@@ -2646,7 +2647,7 @@ var Font = (function FontClosure() {
                          '\x00\x04' + // format
                          string16(format314.length + 4) + // length
                          format314);
-  };
+  }
 
   function validateOS2Table(os2) {
     var stream = new Stream(os2.data);
@@ -2769,7 +2770,7 @@ var Font = (function FontClosure() {
            string16(0) + // usDefaultChar
            string16(firstCharIndex || properties.firstChar) + // usBreakChar
            '\x00\x03';  // usMaxContext
-  };
+  }
 
   function createPostTable(properties) {
     var angle = Math.floor(properties.italicAngle * (Math.pow(2, 16)));
@@ -2782,7 +2783,7 @@ var Font = (function FontClosure() {
            '\x00\x00\x00\x00' + // maxMemType42
            '\x00\x00\x00\x00' + // minMemType1
            '\x00\x00\x00\x00';  // maxMemType1
-  };
+  }
 
   function createNameTable(name, proto) {
     if (!proto) {
@@ -2925,7 +2926,7 @@ var Font = (function FontClosure() {
           offset: offset,
           data: data
         };
-      };
+      }
 
       function readOpenTypeHeader(ttf) {
         return {
@@ -2935,7 +2936,7 @@ var Font = (function FontClosure() {
           entrySelector: int16(ttf.getBytes(2)),
           rangeShift: int16(ttf.getBytes(2))
         };
-      };
+      }
 
       function createGlyphNameMap(glyphs, ids, properties) {
         var glyphNames = properties.glyphNames;
@@ -3171,7 +3172,7 @@ var Font = (function FontClosure() {
           mappings: mappings,
           hasShortCmap: hasShortCmap
         };
-      };
+      }
 
       function sanitizeMetrics(font, header, metrics, numGlyphs) {
         if (!header) {
@@ -3207,7 +3208,7 @@ var Font = (function FontClosure() {
             entries += '\x00\x00';
           metrics.data = stringToArray(entries);
         }
-      };
+      }
 
       function sanitizeGlyph(source, sourceStart, sourceEnd, dest, destStart) {
         if (sourceEnd - sourceStart <= 12) {
@@ -3357,7 +3358,7 @@ var Font = (function FontClosure() {
           startOffset = endOffset;
         }
 
-        if (writeOffset == 0) {
+        if (writeOffset === 0) {
           // glyf table cannot be empty -- redoing the glyf and loca tables
           // to have single glyph with one point
           var simpleGlyph = new Uint8Array(
@@ -3484,7 +3485,7 @@ var Font = (function FontClosure() {
             offset: int16(font.getBytes(2))
           };
           // using only Macintosh and Windows platform/encoding names
-          if ((r.platform == 1 && r.encoding == 0 && r.language == 0) ||
+          if ((r.platform == 1 && r.encoding === 0 && r.language === 0) ||
               (r.platform == 3 && r.encoding == 1 && r.language == 0x409)) {
             records.push(r);
           }
@@ -3516,7 +3517,7 @@ var Font = (function FontClosure() {
         var data = os2Table.data;
         // usWinAscent == 0 makes font unreadable by windows
         var usWinAscent = (data[74] << 8) | data[75];
-        if (usWinAscent == 0)
+        if (usWinAscent === 0)
           return false;
 
         return true;
@@ -3747,7 +3748,7 @@ var Font = (function FontClosure() {
 
       // Sanitizer reduces the glyph advanceWidth to the maxAdvanceWidth
       // Sometimes it's 0. That needs to be fixed
-      if (hhea.data[10] == 0 && hhea.data[11] == 0) {
+      if (hhea.data[10] === 0 && hhea.data[11] === 0) {
         hhea.data[10] = 0xFF;
         hhea.data[11] = 0xFF;
       }
@@ -4211,7 +4212,7 @@ var Font = (function FontClosure() {
       var firstChar = properties.firstChar, lastChar = properties.lastChar;
       var map = [];
       if (properties.composite) {
-        var isIdentityMap = this.cidToUnicode.length == 0;
+        var isIdentityMap = this.cidToUnicode.length === 0;
         for (var i = firstChar, ii = lastChar; i <= ii; i++) {
           // TODO missing map the character according font's CMap
           var cid = i;
@@ -4352,7 +4353,7 @@ var Font = (function FontClosure() {
         if (!charcode && 'toUnicode' in this)
           charcode = this.toUnicode.indexOf(glyphUnicode);
         // setting it to unicode if negative or undefined
-        if (!(charcode > 0))
+        if (charcode <= 0)
           charcode = glyphUnicode;
         // trying to get width via charcode
         width = this.widths[charcode];
@@ -4660,7 +4661,6 @@ var Type1CharString = (function Type1CharStringClosure() {
               break;
             case 11: // return
               return error;
-              break;
             case 13: // hsbw
               if (this.stack.length < 2) {
                 error = true;
@@ -5033,7 +5033,7 @@ var Type1Parser = function type1Parser() {
               var blueArray = readNumberArray(eexecStr, i + 1);
               // *Blue* values may contain invalid data: disables reading of
               // those values when hinting is disabled.
-              if (blueArray.length > 0 && (blueArray.length % 2) == 0 &&
+              if (blueArray.length > 0 && (blueArray.length % 2) === 0 &&
                   HINTING_ENABLED) {
                 program.properties.privateData[token.substring(1)] = blueArray;
               }
@@ -5649,7 +5649,7 @@ var CFFParser = (function CFFParserClosure() {
       while (bytes[offset] != 1)
         ++offset;
 
-      if (offset != 0) {
+      if (offset !== 0) {
         info('cff data is shifted');
         bytes = bytes.subarray(offset);
         this.bytes = bytes;
@@ -5739,7 +5739,7 @@ var CFFParser = (function CFFParserClosure() {
       var start = pos;
       var end = pos;
 
-      if (count != 0) {
+      if (count !== 0) {
         var offsetSize = bytes[pos++];
         // add 1 for offset to determine size of last object
         var startPos = pos + ((count + 1) * offsetSize) - 1;
@@ -5796,8 +5796,8 @@ var CFFParser = (function CFFParserClosure() {
       }
       return strings;
     },
-    createDict: function CFFParser_createDict(type, dict, strings) {
-      var cffDict = new type(strings);
+    createDict: function CFFParser_createDict(Type, dict, strings) {
+      var cffDict = new Type(strings);
       var types = cffDict.types;
 
       for (var i = 0, ii = dict.length; i < ii; ++i) {
@@ -5825,7 +5825,7 @@ var CFFParser = (function CFFParserClosure() {
           var validationCommand = null;
           if (value == 12) {
             var q = data[j++];
-            if (q == 0) {
+            if (q === 0) {
               // The CFF specification state that the 'dotsection' command
               // (12, 0) is deprecated and treated as a no-op, but all Type2
               // charstrings processors should support them. Unfortunately
@@ -5929,7 +5929,7 @@ var CFFParser = (function CFFParserClosure() {
       privateDict.subrsIndex = subrsIndex.obj;
     },
     parseCharsets: function CFFParser_parseCharsets(pos, length, strings, cid) {
-      if (pos == 0) {
+      if (pos === 0) {
         return new CFFCharset(true, CFFCharsetPredefinedTypes.ISO_ADOBE,
                               ISOAdobeCharset);
       } else if (pos == 1) {
@@ -6000,7 +6000,7 @@ var CFFParser = (function CFFParserClosure() {
         }
       }
 
-      if (pos == 0 || pos == 1) {
+      if (pos === 0 || pos == 1) {
         predefined = true;
         format = pos;
         var baseEncoding = pos ? Encodings.ExpertEncoding :
@@ -6253,7 +6253,7 @@ var CFFTopDict = (function CFFTopDictClosure() {
     [[12, 5], 'PaintType', 'num', 0],
     [[12, 6], 'CharstringType', 'num', 2],
     [[12, 7], 'FontMatrix', ['num', 'num', 'num', 'num', 'num', 'num'],
-                            [.001, 0, 0, .001, 0, 0]],
+                            [0.001, 0, 0, 0.001, 0, 0]],
     [13, 'UniqueID', 'num', null],
     [5, 'FontBBox', ['num', 'num', 'num', 'num'], [0, 0, 0, 0]],
     [[12, 8], 'StrokeWidth', 'num', 0],
@@ -6423,7 +6423,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
       array[i] = str.charCodeAt(i);
 
     return array;
-  };
+  }
   function CFFCompiler(cff) {
     this.cff = cff;
   }
@@ -6506,7 +6506,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
       return output.data;
     },
     encodeNumber: function CFFCompiler_encodeNumber(value) {
-      if (parseFloat(value) == parseInt(value) && !isNaN(value)) // isInt
+      if (parseFloat(value) == parseInt(value, 10) && !isNaN(value)) // isInt
         return this.encodeInteger(value);
       else
         return this.encodeFloat(value);
@@ -6706,7 +6706,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
 
       // If there is no object, just create an index. This technically
       // should just be [0, 0] but OTS has an issue with that.
-      if (count == 0)
+      if (count === 0)
         return [0, 0, 0];
 
       var data = [(count >> 8) & 0xFF, count & 0xff];
diff --git a/src/function.js b/src/function.js
index 8442d4e21..6d4627e99 100644
--- a/src/function.js
+++ b/src/function.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals EOF, error, isArray, isBool, Lexer, TODO */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -80,7 +81,7 @@ var PDFFunction = (function PDFFunctionClosure() {
           return this.constructInterpolatedFromIR(IR);
         case CONSTRUCT_STICHED:
           return this.constructStichedFromIR(IR);
-        case CONSTRUCT_POSTSCRIPT:
+        //case CONSTRUCT_POSTSCRIPT:
         default:
           return this.constructPostScriptFromIR(IR);
       }
@@ -233,7 +234,7 @@ var PDFFunction = (function PDFFunctionClosure() {
         }
 
         return y;
-      }
+      };
     },
 
     constructInterpolated: function PDFFunction_constructInterpolated(str,
@@ -270,7 +271,7 @@ var PDFFunction = (function PDFFunctionClosure() {
 
         return out;
 
-      }
+      };
     },
 
     constructStiched: function PDFFunction_constructStiched(fn, dict, xref) {
diff --git a/src/image.js b/src/image.js
index ea4a647ff..a43cc846b 100644
--- a/src/image.js
+++ b/src/image.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals ColorSpace, error, isArray, isStream, JpegStream, Name, Promise, Stream, TODO, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -260,7 +261,7 @@ var PDFImage = (function PDFImageClosure() {
         var buf = 0;
 
         for (var i = 0, ii = length; i < ii; ++i) {
-          if (i % rowComps == 0) {
+          if (i % rowComps === 0) {
             mask = 0;
             buf = 0;
           } else {
@@ -278,7 +279,7 @@ var PDFImage = (function PDFImageClosure() {
         // The general case that handles all other bpc values.
         var bits = 0, buf = 0;
         for (var i = 0, ii = length; i < ii; ++i) {
-          if (i % rowComps == 0) {
+          if (i % rowComps === 0) {
             buf = 0;
             bits = 0;
           }
@@ -374,7 +375,7 @@ var PDFImage = (function PDFImageClosure() {
             buf = imgArray[imgArrayPos++];
             mask = 128;
           }
-          if (!(buf & mask) == inverseDecode) {
+          if (!(buf & mask) === inverseDecode) {
             buffer[bufferPos] = 0;
           }
           bufferPos += 4;
diff --git a/src/jbig2.js b/src/jbig2.js
index f0b736731..5a81bdf82 100644
--- a/src/jbig2.js
+++ b/src/jbig2.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals error, shadow */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -123,7 +124,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
           return d;
         } else {
           this.chigh -= qeIcx;
-          if ((this.a & 0x8000) == 0) {
+          if ((this.a & 0x8000) === 0) {
             var d = this.exchangeMps(cx);
             this.renormD();
             return d;
@@ -134,14 +135,14 @@ var Jbig2Image = (function Jbig2ImageClosure() {
       },
       renormD: function ArithmeticDecoder_renormD() {
         do {
-          if (this.ct == 0)
+          if (this.ct === 0)
             this.byteIn();
 
           this.a <<= 1;
           this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1);
           this.clow = (this.clow << 1) & 0xFFFF;
           this.ct--;
-        } while ((this.a & 0x8000) == 0);
+        } while ((this.a & 0x8000) === 0);
       },
       exchangeMps: function ArithmeticDecoder_exchangeMps(cx) {
         var d;
@@ -261,7 +262,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
           break;
         default:
           v = v * 2 + bit;
-          if (--toRead == 0)
+          if (--toRead === 0)
             state = 0;
           continue;
       }
@@ -437,7 +438,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
                             offsetX, offsetY, prediction, at,
                             decodingContext) {
     var codingTemplate = RefinementTemplates[templateIndex].coding;
-    if (templateIndex == 0)
+    if (templateIndex === 0)
       codingTemplate = codingTemplate.concat([at[0]]);
     var codingTemplateLength = codingTemplate.length;
     var codingTemplateX = new Int32Array(codingTemplateLength);
@@ -447,7 +448,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
       codingTemplateY[k] = codingTemplate[k].y;
     }
     var referenceTemplate = RefinementTemplates[templateIndex].reference;
-    if (templateIndex == 0)
+    if (templateIndex === 0)
       referenceTemplate = referenceTemplate.concat([at[1]]);
     var referenceTemplateLength = referenceTemplate.length;
     var referenceTemplateX = new Int32Array(referenceTemplateLength);
@@ -530,7 +531,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
       var totalWidth = 0;
       while (true) {
         var deltaWidth = decodeInteger(contextCache, 'IADW', decoder); // 6.5.7
-        if (deltaWidth == null)
+        if (deltaWidth === null)
           break; // OOB
         currentWidth += deltaWidth;
         totalWidth += currentWidth;
@@ -657,7 +658,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
         i++;
 
         var deltaS = decodeInteger(contextCache, 'IADS', decoder); // 6.4.8
-        if (deltaS == null)
+        if (deltaS === null)
           break; // OOB
         currentS += deltaS + dsOffset;
       } while (true);
@@ -779,7 +780,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
         dictionary.refinementTemplate = (dictionaryFlags >> 12) & 1;
         position += 2;
         if (!dictionary.huffman) {
-          var atLength = dictionary.template == 0 ? 4 : 1;
+          var atLength = dictionary.template === 0 ? 4 : 1;
           var at = [];
           for (var i = 0; i < atLength; i++) {
             at.push({
@@ -865,7 +866,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
         genericRegion.template = (genericRegionSegmentFlags >> 1) & 3;
         genericRegion.prediction = !!(genericRegionSegmentFlags & 8);
         if (!genericRegion.mmr) {
-          var atLength = genericRegion.template == 0 ? 4 : 1;
+          var atLength = genericRegion.template === 0 ? 4 : 1;
           var at = [];
           for (var i = 0; i < atLength; i++) {
             at.push({
diff --git a/src/jpx.js b/src/jpx.js
index 0df607541..017f0328a 100644
--- a/src/jpx.js
+++ b/src/jpx.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals error, globalScope, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -43,7 +44,7 @@ var JpxImage = (function JpxImageClosure() {
       xhr.send(null);
     },
     parse: function JpxImage_parse(data) {
-      function ReadUint(data, offset, bytes) {
+      function readUint(data, offset, bytes) {
         var n = 0;
         for (var i = 0; i < bytes; i++)
           n = n * 256 + (data[offset + i] & 0xFF);
@@ -52,15 +53,15 @@ var JpxImage = (function JpxImageClosure() {
       var position = 0, length = data.length;
       while (position < length) {
         var headerSize = 8;
-        var lbox = ReadUint(data, position, 4);
-        var tbox = ReadUint(data, position + 4, 4);
+        var lbox = readUint(data, position, 4);
+        var tbox = readUint(data, position + 4, 4);
         position += headerSize;
         if (lbox == 1) {
-          lbox = ReadUint(data, position, 8);
+          lbox = readUint(data, position, 8);
           position += 8;
           headerSize += 8;
         }
-        if (lbox == 0)
+        if (lbox === 0)
           lbox = length - position + headerSize;
         if (lbox < headerSize)
           error('JPX error: Invalid box field size');
@@ -289,7 +290,7 @@ var JpxImage = (function JpxImageClosure() {
               tile.partsCount = data[position + 9];
 
               context.mainHeader = false;
-              if (tile.partIndex == 0) {
+              if (tile.partIndex === 0) {
                 // reset component specific settings
                 tile.COD = context.COD;
                 tile.COC = context.COC.slice(0); // clone of the global COC
@@ -300,7 +301,7 @@ var JpxImage = (function JpxImageClosure() {
               break;
             case 0xFF93: // Start of data (SOD)
               var tile = context.currentTile;
-              if (tile.partIndex == 0) {
+              if (tile.partIndex === 0) {
                 initializeTile(context, tile.index);
                 buildPackets(context);
               }
@@ -631,7 +632,7 @@ var JpxImage = (function JpxImageClosure() {
         resolutions.push(resolution);
 
         var subband;
-        if (r == 0) {
+        if (r === 0) {
           // one sub-band (LL) with last decomposition
           subband = {};
           subband.type = 'LL';
@@ -733,7 +734,7 @@ var JpxImage = (function JpxImageClosure() {
     }
     function readCodingpasses() {
       var value = readBits(1);
-      if (value == 0)
+      if (value === 0)
         return 1;
       value = (value << 1) | readBits(1);
       if (value == 0x02)
@@ -853,7 +854,7 @@ var JpxImage = (function JpxImageClosure() {
       var codeblock = codeblocks[i];
       var blockWidth = codeblock.tbx1_ - codeblock.tbx0_;
       var blockHeight = codeblock.tby1_ - codeblock.tby0_;
-      if (blockWidth == 0 || blockHeight == 0)
+      if (blockWidth === 0 || blockHeight === 0)
         continue;
       if (!('data' in codeblock))
         continue;
@@ -905,7 +906,7 @@ var JpxImage = (function JpxImageClosure() {
           var n = (bitModel.coefficentsSign[position] ? -1 : 1) *
             bitModel.coefficentsMagnitude[position];
           var nb = bitModel.bitsDecoded[position], correction;
-          if (transformation == 0 || mb > nb) {
+          if (transformation === 0 || mb > nb) {
             // use r only if transformation is irreversible or
             // not all bitplanes were decoded for reversible transformation
             n += n < 0 ? n - r : n > 0 ? n + r : 0;
@@ -974,7 +975,7 @@ var JpxImage = (function JpxImageClosure() {
     }
 
     var transformation = codingStyleParameters.transformation;
-    var transform = transformation == 0 ? new IrreversibleTransform() :
+    var transform = transformation === 0 ? new IrreversibleTransform() :
       new ReversibleTransform();
     var result = transform.calculate(subbandCoefficients,
       component.tcx0, component.tcy0);
@@ -1304,7 +1305,7 @@ var JpxImage = (function JpxImageClosure() {
           return d;
         } else {
           this.chigh -= qeIcx;
-          if ((this.a & 0x8000) == 0) {
+          if ((this.a & 0x8000) === 0) {
             var d = this.exchangeMps(cx);
             this.renormD();
             return d;
@@ -1315,14 +1316,14 @@ var JpxImage = (function JpxImageClosure() {
       },
       renormD: function ArithmeticDecoder_renormD() {
         do {
-          if (this.ct == 0)
+          if (this.ct === 0)
             this.byteIn();
 
           this.a <<= 1;
           this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1);
           this.clow = (this.clow << 1) & 0xFFFF;
           this.ct--;
-        } while ((this.a & 0x8000) == 0);
+        } while ((this.a & 0x8000) === 0);
       },
       exchangeMps: function ArithmeticDecoder_exchangeMps(cx) {
         var d;
@@ -1558,12 +1559,12 @@ var JpxImage = (function JpxImageClosure() {
 
               // significant but not those that have just become
               if (!coefficentsMagnitude[index] ||
-                (processingFlags[index] & processedMask) != 0)
+                (processingFlags[index] & processedMask) !== 0)
                 continue;
 
               var contextLabel = 16;
               if ((processingFlags[index] &
-                firstMagnitudeBitMask) != 0) {
+                firstMagnitudeBitMask) !== 0) {
                 processingFlags[i * width + j] ^= firstMagnitudeBitMask;
                 // first refinement
                 var significance = neighborsSignificance[index];
@@ -1604,14 +1605,14 @@ var JpxImage = (function JpxImageClosure() {
             // using the property: labels[neighborsSignificance[index]] == 0
             // when neighborsSignificance[index] == 0
             var allEmpty = i0 + 3 < height &&
-              processingFlags[index0] == 0 &&
-              processingFlags[index0 + oneRowDown] == 0 &&
-              processingFlags[index0 + twoRowsDown] == 0 &&
-              processingFlags[index0 + threeRowsDown] == 0 &&
-              neighborsSignificance[index0] == 0 &&
-              neighborsSignificance[index0 + oneRowDown] == 0 &&
-              neighborsSignificance[index0 + twoRowsDown] == 0 &&
-              neighborsSignificance[index0 + threeRowsDown] == 0;
+              processingFlags[index0] === 0 &&
+              processingFlags[index0 + oneRowDown] === 0 &&
+              processingFlags[index0 + twoRowsDown] === 0 &&
+              processingFlags[index0 + threeRowsDown] === 0 &&
+              neighborsSignificance[index0] === 0 &&
+              neighborsSignificance[index0 + oneRowDown] === 0 &&
+              neighborsSignificance[index0 + twoRowsDown] === 0 &&
+              neighborsSignificance[index0 + threeRowsDown] === 0;
             var i1 = 0, index = index0;
             var cx, i;
             if (allEmpty) {
@@ -1647,7 +1648,7 @@ var JpxImage = (function JpxImageClosure() {
                 break;
 
               if (coefficentsMagnitude[index] ||
-                (processingFlags[index] & processedMask) != 0)
+                (processingFlags[index] & processedMask) !== 0)
                 continue;
 
               var contextLabel = labels[neighborsSignificance[index]];
@@ -1733,7 +1734,7 @@ var JpxImage = (function JpxImageClosure() {
       for (var v = 0; v < height; v++) {
         if (width == 1) {
           // if width = 1, when u0 even keep items as is, when odd divide by 2
-          if ((u0 % 1) != 0) {
+          if ((u0 % 1) !== 0) {
             items[v * width] /= 2;
           }
           continue;
@@ -1768,7 +1769,7 @@ var JpxImage = (function JpxImageClosure() {
       for (var u = 0; u < width; u++) {
         if (height == 1) {
           // if height = 1, when v0 even keep items as is, when odd divide by 2
-          if ((v0 % 1) != 0) {
+          if ((v0 % 1) !== 0) {
             items[u] /= 2;
           }
           continue;
diff --git a/src/metadata.js b/src/metadata.js
index 08164054b..029ad77f5 100644
--- a/src/metadata.js
+++ b/src/metadata.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals Document, error, PDFJS */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/src/obj.js b/src/obj.js
index df09d3630..d3f2df96c 100644
--- a/src/obj.js
+++ b/src/obj.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals assertWellFormed, bytesToString, CipherTransformFactory, error, info, InvalidPDFException, isArray, isCmd, isDict, isInt, isName, isRef, isStream, JpegStream, Lexer, log, Page, Parser, Promise, shadow, stringToPDFString, stringToUTF8String, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -100,7 +101,7 @@ var Dict = (function DictClosure() {
         callback(key, this.get(key));
       }
     };
-  };
+  }
 
   return Dict;
 })();
@@ -442,7 +443,7 @@ var XRef = (function XRefClosure() {
           for (j = 0; j < typeFieldWidth; ++j)
             type = (type << 8) | stream.getByte();
           // if type field is absent, its default value = 1
-          if (typeFieldWidth == 0)
+          if (typeFieldWidth === 0)
             type = 1;
           for (j = 0; j < offsetFieldWidth; ++j)
             offset = (offset << 8) | stream.getByte();
@@ -678,7 +679,7 @@ var XRef = (function XRefClosure() {
         }
         if (!isCmd(obj3, 'obj')) {
           // some bad pdfs use "obj1234" and really mean 1234
-          if (obj3.cmd.indexOf('obj') == 0) {
+          if (obj3.cmd.indexOf('obj') === 0) {
             num = parseInt(obj3.cmd.substring(3), 10);
             if (!isNaN(num))
               return num;
diff --git a/src/parser.js b/src/parser.js
index 6f738b80e..4c99c0683 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals Ascii85Stream, AsciiHexStream, CCITTFaxStream, Cmd, Dict, error, FlateStream, isArray, isCmd, isDict, isInt, isName, isNum, isRef, isString, Jbig2Stream, JpegStream, JpxStream, LZWStream, Name, NullStream, PredictorStream, Ref, RunLengthStream, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -133,7 +134,7 @@ var Parser = (function ParserClosure() {
 
       // searching for the /EI\s/
       var state = 0, ch;
-      while (state != 4 && (ch = stream.getByte()) != null) {
+      while (state != 4 && (ch = stream.getByte()) !== null && ch !== undefined) {
         switch (ch) {
           case 0x20:
           case 0x0D:
@@ -364,7 +365,7 @@ var Lexer = (function LexerClosure() {
             str += ch;
             break;
           case ')':
-            if (--numParen == 0) {
+            if (--numParen === 0) {
               done = true;
             } else {
               str += ch;
@@ -540,6 +541,7 @@ var Lexer = (function LexerClosure() {
             stream.skip();
             return Cmd.get('>>');
           }
+          return Cmd.get(ch);
         case '{':
         case '}':
           return Cmd.get(ch);
diff --git a/src/pattern.js b/src/pattern.js
index 5300f8366..0b5f4c435 100644
--- a/src/pattern.js
+++ b/src/pattern.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals CanvasGraphics, ColorSpace, createScratchCanvas, DeviceRgbCS, error, info, isArray, isPDFFunction, isStream, PDFFunction, TODO, Util, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/src/stream.js b/src/stream.js
index 1b4c5f966..eb43d4623 100644
--- a/src/stream.js
+++ b/src/stream.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals bytesToString, ColorSpace, Dict, EOF, error, info, Jbig2Image, JpegImage, JpxImage, Lexer */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -247,7 +248,7 @@ var StreamsSequenceStream = (function StreamsSequenceStreamClosure() {
     function streamSequenceStreamReadBlock() {
 
     var streams = this.streams;
-    if (streams.length == 0) {
+    if (streams.length === 0) {
       this.eof = true;
       return;
     }
@@ -367,7 +368,7 @@ var FlateStream = (function FlateStreamClosure() {
       error('Invalid header in flate stream: ' + cmf + ', ' + flg);
     if ((cmf & 0x0f) != 0x08)
       error('Unknown compression method in flate stream: ' + cmf + ', ' + flg);
-    if ((((cmf << 8) + flg) % 31) != 0)
+    if ((((cmf << 8) + flg) % 31) !== 0)
       error('Bad FCHECK in flate stream: ' + cmf + ', ' + flg);
     if (flg & 0x20)
       error('FDICT bit set in flate stream: ' + cmf + ', ' + flg);
@@ -421,7 +422,7 @@ var FlateStream = (function FlateStreamClosure() {
     var code = codes[codeBuf & ((1 << maxLen) - 1)];
     var codeLen = code >> 16;
     var codeVal = code & 0xffff;
-    if (codeSize == 0 || codeSize < codeLen || codeLen == 0)
+    if (codeSize === 0 || codeSize < codeLen || codeLen === 0)
       error('Bad encoding in flate stream');
     this.codeBuf = (codeBuf >> codeLen);
     this.codeSize = (codeSize - codeLen);
@@ -475,7 +476,7 @@ var FlateStream = (function FlateStreamClosure() {
       this.eof = true;
     hdr >>= 1;
 
-    if (hdr == 0) { // uncompressed block
+    if (hdr === 0) { // uncompressed block
       var bytes = this.bytes;
       var bytesPos = this.bytesPos;
       var b;
@@ -708,7 +709,7 @@ var PredictorStream = (function PredictorStreamClosure() {
     var buffer = this.ensureBuffer(bufferLength + rowBytes);
 
     var prevRow = buffer.subarray(bufferLength - rowBytes, bufferLength);
-    if (prevRow.length == 0)
+    if (prevRow.length === 0)
       prevRow = new Uint8Array(rowBytes);
 
     var j = bufferLength;
@@ -793,10 +794,10 @@ var JpegStream = (function JpegStreamClosure() {
     // Looking for APP14, 'Adobe'
     for (var i = 0; i < maxBytesScanned; ++i) {
       if (bytes[i] == 0xFF && bytes[i + 1] == 0xEE &&
-          bytes[i + 2] == 0x00 && bytes[i + 3] == 0x0E &&
+          bytes[i + 2] === 0x00 && bytes[i + 3] == 0x0E &&
           bytes[i + 4] == 0x41 && bytes[i + 5] == 0x64 &&
           bytes[i + 6] == 0x6F && bytes[i + 7] == 0x62 &&
-          bytes[i + 8] == 0x65 && bytes[i + 9] == 0x00)
+          bytes[i + 8] == 0x65 && bytes[i + 9] === 0x00)
           return true;
       // scanning until frame tag
       if (bytes[i] == 0xFF && bytes[i + 1] == 0xC0)
@@ -1053,7 +1054,7 @@ var DecryptStream = (function DecryptStreamClosure() {
 
   DecryptStream.prototype.readBlock = function DecryptStream_readBlock() {
     var chunk = this.str.getBytes(chunkSize);
-    if (!chunk || chunk.length == 0) {
+    if (!chunk || chunk.length === 0) {
       this.eof = true;
       return;
     }
@@ -1695,7 +1696,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
     this.columns = params.get('Columns') || 1728;
     this.rows = params.get('Rows') || 0;
     var eoblock = params.get('EndOfBlock');
-    if (eoblock == null)
+    if (eoblock === null || eoblock === undefined)
       eoblock = true;
     this.eoblock = eoblock;
     this.black = params.get('BlackIs1') || false;
@@ -1714,7 +1715,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
     this.buf = EOF;
 
     var code1;
-    while ((code1 = this.lookBits(12)) == 0) {
+    while ((code1 = this.lookBits(12)) === 0) {
       this.eatBits(1);
     }
     if (code1 == 1) {
@@ -1798,7 +1799,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
 
     var refPos, blackPixels, bits;
 
-    if (this.outputBits == 0) {
+    if (this.outputBits === 0) {
       if (this.eof)
         return null;
 
@@ -1972,7 +1973,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
         this.eof = true;
       } else {
         code1 = this.lookBits(12);
-        while (code1 == 0) {
+        while (code1 === 0) {
           this.eatBits(1);
           code1 = this.lookBits(12);
         }
@@ -2040,7 +2041,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
     if (this.outputBits >= 8) {
       this.buf = (this.codingPos & 1) ? 0 : 0xFF;
       this.outputBits -= 8;
-      if (this.outputBits == 0 && codingLine[this.codingPos] < columns) {
+      if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
         this.codingPos++;
         this.outputBits = (codingLine[this.codingPos] -
                            codingLine[this.codingPos - 1]);
@@ -2139,7 +2140,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
       if (code == EOF)
         return 1;
 
-      if ((code >> 5) == 0)
+      if ((code >> 5) === 0)
         p = whiteTable1[code];
       else
         p = whiteTable2[code >> 3];
@@ -2170,9 +2171,9 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
       code = this.lookBits(13);
       if (code == EOF)
         return 1;
-      if ((code >> 7) == 0)
+      if ((code >> 7) === 0)
         p = blackTable1[code];
-      else if ((code >> 9) == 0 && (code >> 7) != 0)
+      else if ((code >> 9) === 0 && (code >> 7) !== 0)
         p = blackTable2[(code >> 1) - 64];
       else
         p = blackTable3[code >> 7];
@@ -2202,8 +2203,8 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
   CCITTFaxStream.prototype.lookBits = function CCITTFaxStream_lookBits(n) {
     var c;
     while (this.inputBits < n) {
-      if ((c = this.str.getByte()) == null) {
-        if (this.inputBits == 0)
+      if ((c = this.str.getByte()) === null || c === undefined) {
+        if (this.inputBits === 0)
           return EOF;
         return ((this.inputBuf << (n - this.inputBits)) &
                 (0xFFFF >> (16 - n)));
@@ -2256,7 +2257,7 @@ var LZWStream = (function LZWStreamClosure() {
     var cachedData = this.cachedData;
     while (bitsCached < n) {
       var c = this.str.getByte();
-      if (c == null) {
+      if (c === null || c === undefined) {
         this.eof = true;
         return null;
       }
diff --git a/src/util.js b/src/util.js
index f30a42032..1d0cf1003 100644
--- a/src/util.js
+++ b/src/util.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals Cmd, DeviceCmykCS, Dict, globalScope, INFOS, MozBlobBuilder, Name, PDFJS, Ref, WARNINGS, verbosity */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -253,7 +254,7 @@ var Util = PDFJS.Util = (function UtilClosure() {
       m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
       m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
     ];
-  }
+  };
 
   // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
   // For coordinate systems whose origin lies in the bottom-left, this
@@ -270,7 +271,7 @@ var Util = PDFJS.Util = (function UtilClosure() {
       r[3] = rect[1];
     }
     return r;
-  }
+  };
 
   // Returns a rectangle [x1, y1, x2, y2] corresponding to the
   // intersection of rect1 and rect2. If no intersection, returns 'false'
@@ -278,7 +279,7 @@ var Util = PDFJS.Util = (function UtilClosure() {
   Util.intersect = function Util_intersect(rect1, rect2) {
     function compare(a, b) {
       return a - b;
-    };
+    }
 
     // Order points along the axes
     var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
@@ -338,15 +339,15 @@ var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
       case 270:
         rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
         break;
-      case 360:
-      case 0:
+      //case 360:
+      //case 0:
       default:
         rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
         break;
     }
     var offsetCanvasX, offsetCanvasY;
     var width, height;
-    if (rotateA == 0) {
+    if (rotateA === 0) {
       offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
       offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
       width = Math.abs(viewBox[3] - viewBox[1]) * scale;
@@ -468,11 +469,11 @@ function isArray(v) {
 }
 
 function isStream(v) {
-  return typeof v == 'object' && v != null && ('getChar' in v);
+  return typeof v == 'object' && v !== null && v !== undefined && ('getChar' in v);
 }
 
 function isArrayBuffer(v) {
-  return typeof v == 'object' && v != null && ('byteLength' in v);
+  return typeof v == 'object' && v !== null && v !== undefined && ('byteLength' in v);
 }
 
 function isRef(v) {
@@ -517,7 +518,7 @@ var Promise = PDFJS.Promise = (function PromiseClosure() {
     this.error = null;
     this.exception = null;
     // If you build a promise and pass in some data it's already resolved.
-    if (data != null) {
+    if (data !== null && data !== undefined) {
       this.isResolved = true;
       this._data = data;
       this.hasData = true;
@@ -528,7 +529,7 @@ var Promise = PDFJS.Promise = (function PromiseClosure() {
     this.callbacks = [];
     this.errbacks = [];
     this.progressbacks = [];
-  };
+  }
   /**
    * Builds a promise that is resolved when all the passed in promises are
    * resolved.
diff --git a/src/utils/fonts_utils.js b/src/utils/fonts_utils.js
index bbf17a202..27bad2a58 100644
--- a/src/utils/fonts_utils.js
+++ b/src/utils/fonts_utils.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals CFFDictDataMap, CFFDictPrivateDataMap, CFFEncodingMap, CFFStrings, Components, Dict, dump, error, isNum, log, netscape, Stream, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,6 +16,8 @@
  * limitations under the License.
  */
 
+'use strict';
+
 /*
  * The Type2 reader code below is only used for debugging purpose since Type2
  * is only a CharString format and is never used directly as a Font file.
@@ -33,7 +36,7 @@ function readCharset(aStream, aCharstrings) {
 
   var format = aStream.getByte();
   var count = aCharstrings.length - 1;
-  if (format == 0) {
+  if (format === 0) {
     charset['.notdef'] = readCharstringEncoding(aCharstrings[0]);
 
     for (var i = 1; i < count + 1; i++) {
@@ -250,7 +253,7 @@ var Type2Parser = function type2Parser(aFilePath) {
   var xhr = new XMLHttpRequest();
   xhr.open('GET', aFilePath, false);
   xhr.mozResponseType = xhr.responseType = 'arraybuffer';
-  xhr.expected = (document.URL.indexOf('file:') == 0) ? 0 : 200;
+  xhr.expected = (document.URL.indexOf('file:') === 0) ? 0 : 200;
   xhr.send(null);
   this.data = new Stream(xhr.mozResponseArrayBuffer || xhr.mozResponse ||
                          xhr.responseArrayBuffer || xhr.response);
@@ -365,7 +368,7 @@ var Type2Parser = function type2Parser(aFilePath) {
     // Read Charset
     dump('Read Charset for ' + charStrings.length + ' glyphs');
     var charsetEntry = font.get('charset');
-    if (charsetEntry == 0) {
+    if (charsetEntry === 0) {
       error('Need to support CFFISOAdobeCharset');
     } else if (charsetEntry == 1) {
       error('Need to support CFFExpert');
diff --git a/src/worker.js b/src/worker.js
index fa53a0dde..f485ccc63 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals CanvasGraphics, error, globalScope, InvalidPDFException, log, MissingPDFException, PasswordException, PDFDocument, PDFJS, Promise, Stream, UnknownErrorException, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -252,19 +253,21 @@ var WorkerMessageHandler = {
         var minimumStackMessage =
             'worker.js: while trying to getPage() and getOperatorList()';
 
+        var wrappedException;
+
         // Turn the error into an obj that can be serialized
         if (typeof e === 'string') {
-          e = {
+          wrappedException = {
             message: e,
             stack: minimumStackMessage
           };
         } else if (typeof e === 'object') {
-          e = {
+          wrappedException = {
             message: e.message || e.toString(),
             stack: e.stack || minimumStackMessage
           };
         } else {
-          e = {
+          wrappedException = {
             message: 'Unknown exception type: ' + (typeof e),
             stack: minimumStackMessage
           };
@@ -272,7 +275,7 @@ var WorkerMessageHandler = {
 
         handler.send('PageError', {
           pageNum: pageNum,
-          error: e
+          error: wrappedException
         });
         return;
       }
@@ -284,7 +287,7 @@ var WorkerMessageHandler = {
       var fonts = {};
       for (var i = 0, ii = dependency.length; i < ii; i++) {
         var dep = dependency[i];
-        if (dep.indexOf('g_font_') == 0) {
+        if (dep.indexOf('g_font_') === 0) {
           fonts[dep] = true;
         }
       }
@@ -341,7 +344,7 @@ var workerConsole = {
 
   timeEnd: function timeEnd(name) {
     var time = consoleTimer[name];
-    if (time == null) {
+    if (!time) {
       error('Unkown timer name ' + name);
     }
     this.log('Timer:', name, Date.now() - time);
diff --git a/test/reporter.js b/test/reporter.js
new file mode 100644
index 000000000..a203d1c65
--- /dev/null
+++ b/test/reporter.js
@@ -0,0 +1,28 @@
+"use strict";
+
+module.exports = {
+  reporter: function (res) {
+    var len = 0;
+    var str = "";
+
+    res.forEach(function (r) {
+      var file = r.file;
+      var err = r.error;
+
+      switch(err.code) {
+        case 'W004': // variable is already defined
+        case 'W018': // confusing use of !
+          break;
+        default:
+          len++;
+          str += file + ": line " + err.line + ", col " +
+            err.character + ", " + err.reason + "\n";
+      }
+    });
+
+    if (str) {
+      process.stdout.write(str + "\n" + len + " error" +
+        ((len === 1) ? "" : "s") + "\n");
+    }
+  }
+};