I’ve been trying out Firefox 3 and one strategy I do is to copy my Mozilla Firefox folder with me to whatever machine I go to so I don’t have to reinstall plugins, re-enter all my passwords, and configure everything about Firefox until I’m happy.
However, it seems due to some reason or another I lost the ability to install extensions. After Googling around I dug up a nice hint on Ubuntu’s Launchpad site.
Basically delete the file named extensions.rdf in your Mozilla directory
- Windows: C:\Documents And Settings\[Username]\Application Data\Mozilla Firefox\
- Linux (Fedora 9 and Ubuntu 7.10): $HOME/.mozilla/firefox/profile/MY_PROFILE/