Modify Your Extensions to Work in Firefox 3

Author: ajua

16 Jul

There are many Firefox extensions that still don’t work with versions 3.0 and higher yet.

I updated Firefox to 3.0.1 and discovered that one of my favorites, Tab Mix Plus, was not compatible.

After investigating how the extensions and versions work, i found an easy way to modify some of them to work with Firefox version 3.0 and higher.

Follow this instructions and hopefully you will get yours to work:

Manually download the extension you want to modify. You can right-click and choose Save Link As to save the XPI file.
Rename the XPI extension to ZIP and open it with WinRAR, WinZIP or 7.Zip.
Extract the file install.rdf and open it with Notepad or other text editor.
Look for this line: em:maxVersion=”3.0″ and change it to the last version of Firefox you have. In this case i have 3.0.1 so i changed it to em:maxVersion=”3.0.1″.
Save the file and update it inside the ZIP archive.
Change the ZIP extension back to XPI and install it. A fast way to do it is to drag it to a Firefox window. The install extension dialog will appear and if all went right, you should be able to use it.

Be aware that this is not guaranteed to work with all the incompatible extensions because some of them work different or they may have different features for the browser versions.

I have made this modification to MinimizeToTray and it works great as well.