If you’ve downloaded, like me, the Firefox 3.6 Beta release and you’ve seen that your favorite extensions don’t work on it this guide is for you.
I have not given up when my extensions didn’t seem to work properly and I tried a solution, and finally I found the solution in the How To Geek’s web site. Here it is:
- This is the error you get when you try and install an extension that isn’t compatible. Pay special attention to the Firefox version string, as we’ll need that later.
- Type about:config into the address bar, and then after clicking through the warning, you’ll want to right-click in the list and choose New –> Boolean from the menu.
- Now you’ll be prompted to enter the preference name. This is where you need to pay attention to the exact version you are using, because the preference has to be set for the exact version of Firefox you are using.
- We’re using Firefox 3.6b3, as noted in the error message above, so the preference would be the following…note the capital C there, very important.
extensions.checkCompatibility.3.6b
Basically the format is extensions.checkCompatibility.VERSION.b for Beta releases or extensions.checkCompatibility.VERSION.a for Alpha releases. So if you were testing out Firefox 3.8 Alpha, you’d use extensions.checkCompatibility.3.8a as the preference name.
- Yeah, that wasn’t the simplest thing. On the next dialog, just choose “false” and close the dialog.
- Your extensions should now install. If they don’t, then you probably put the wrong version into the preference name.
One Comment
or you could just install Nightly Tester Tools extension, which will force install your extensions for any version without all the fuss and typing. I’ve been using it for years.