diff --git a/README.md b/README.md
index 04b44bc29..490bafc83 100644
--- a/README.md
+++ b/README.md
@@ -36,8 +36,9 @@ available that are updated at a different rate:
 + [Development Version](http://mozilla.github.io/pdf.js/extensions/firefox/pdf.js.xpi) - This version is updated every time new code is merged into the PDF.js codebase. This should be quite stable but still might break from time to time.
 + [Stable Version](https://addons.mozilla.org/firefox/addon/pdfjs) - After version 24 of Firefox is released we no longer plan to support the stable extension. The stable version will then be considered whatever is built into Firefox.
 
-#### Chrome
-The Chrome extension is still somewhat experimental but it can be installed two
+#### Chrome and Opera
+
+The Chromium extension is still somewhat experimental but it can be installed two
 ways:
 
 + [Unofficial Version](https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm) - *This extension is maintained by a PDF.js contributor.*
@@ -45,6 +46,8 @@ ways:
 Chrome, go to `Tools > Extension` and load the (unpackaged) extension from the
 directory `build/chrome`.
 
+The version of the extension for the Opera browser can be found at the [Opera add-ons](https://addons.opera.com/en/extensions/details/pdf-viewer/).
+
 ## Getting the Code
 
 To get a local copy of the current code, clone it using git: