Rated 5 out of 5 stars
You cannot use the version found here on any version of Firefox greater than 3.x.
They made changes to the way extensions are handled in 4.x and again in 5.x.
I have modified the addon to work with versions 4.x and above and I have it available for download here:
My Release - Fixed for 4.x & above (NEW LINK) This is the ONLY place I release my version.
To install it:
1) Download the archive from the link above.
2) Remove the existing addon from Firefox and restart Firefox.
3) Click on File->Open and browse to where you downloaded it to.
4) Select the archive and let it install.
Now, If you don't trust my code that's fine. If you read through all of my reviews here I describe exactly what
changes were made to get it to work. You can download the version here and make those changes manually to get
it to work with FF 4.x and above. I simply provide the modified archive for those who are not technically inclined.
This version has been tested on 10 & 11 as well and works without issue.
This is a new link that I have modified slightly:
File modified: install.rdf
1) Bumped up the revision number to 22.214.171.124.
2) Modified install.rdf with new revision number and allowing it to install on Firefox up to version 12.
MD5 Checksum: 1c9a3db9d149f18fb24a30064c37b6d4