diff --git a/web/viewer.js b/web/viewer.js
index 6438d3f75..d8b62d1ba 100644
--- a/web/viewer.js
+++ b/web/viewer.js
@@ -320,8 +320,7 @@ var PDFViewerApplication = {
 
   get supportsIntegratedFind() {
     var support = false;
-//#if !(FIREFOX || MOZCENTRAL)
-//#else
+//#if (FIREFOX || MOZCENTRAL)
 //  support = FirefoxCom.requestSync('supportsIntegratedFind');
 //#endif
 
@@ -330,8 +329,7 @@ var PDFViewerApplication = {
 
   get supportsDocumentFonts() {
     var support = true;
-//#if !(FIREFOX || MOZCENTRAL)
-//#else
+//#if (FIREFOX || MOZCENTRAL)
 //  support = FirefoxCom.requestSync('supportsDocumentFonts');
 //#endif
 
@@ -340,8 +338,7 @@ var PDFViewerApplication = {
 
   get supportsDocumentColors() {
     var support = true;
-//#if !(FIREFOX || MOZCENTRAL)
-//#else
+//#if (FIREFOX || MOZCENTRAL)
 //  support = FirefoxCom.requestSync('supportsDocumentColors');
 //#endif