How to get incompatible Firefox add-ons to work

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

Posted by David Artiss

Enterprise Happiness Engineer for the WordPress VIP team at Automattic. Gamer, film lover and general fan of all things Marvel, Star Trek and Star Wars. Failed comedian. Writer for The Big Tech Question. World's Greatest Grandma.

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