A firefox extension has to indicate its supporting version of Firefox in its installing package. In this post I will show you how to force install an extension which does not support a new version of Firefox.
- In Firefox address bar input
- Add a new boolean type preference with value false
http://kb.mozillazine.org/Extensions.checkCompatibility for details.
Example for Firefox 5.0
- Then you can install extensions as normal and it will not complain about the version mismatch anymore.