Now that we've gotten that out of the way, I can get to the meat of the hack. Each extension has a parameter that determines what version of Firefox it will work with. This "maxversion" parameter is inside the install.rdf file located within the extension.
But you may ask, "Dude, the extension is just a single XPI file. Where's the install.rdf?"
Well, the xpi format is actually a version of the zip file format, so all you do is rename the xpi file to a zip file and then extract the contents to its on folder. Look inside and, voila, you have your install.rdf.
Here are the steps for all you people who like steps:
- Download the extension (ending in .xpi) to your computer.
- Rename the file to end in .zip.
- Extract the contents of the zip file to its own folder.
I use Winzip to do this. - Within the file install.rdf, edit the maxversion line so that it uses the latest version of Firefox. For example, if the latest version is Firefox 1.5, use the following line:
<maxversion>1.5</maxversion>
