Considering how regularly new versions of Firefox now come along, that's quite some bug fix list in version 10! http://t.co/K3I2vLpW 1 week ago

22nd

Jan 10

How to get incompatible Firefox add-ons to work

Written by David Artiss. Published 2 years ago. Last modified 1 week, 2 days ago. In categories Tips.

This post was written 2 years 21 days days old, so is a bit old now. Feel free to read and comment on this post, just remember some things change with time and any facts in this post may not be accurate anymore.

Firefox 3.6 has been released and that means, once again, that you might find some of your add-ons don’t work. Now, this isn’t Firefox just wanting to cause problems for us all, but for genuine security and stability reasons.

None-the-less, if you need to get an add-on working, then there is a (relatively) simple way to do it.

Download the .XPI add-on file
Change the file extension from .XPI to .ZIP (because that is what they really are)
Double click the .ZIP and you should see a file called install.rdf
Drag this file out of the zip, to your folder or desktop
Open the .RDF file with Notepad
Find the line that contains maxVersion and change the 3.5 to the current version of Firefox
Save and close the .RDF
Drag the edited file back into the .ZIP
Close the .ZIP and rename it back to .XPI
Double click the .XPI and it should offer to install to Firefox