1 - Run the command below to launch the Profile Manager with Firefox 3.0.11
2 - Create a new profile with the Profile Manager. Then close Firefox 3.0.11.Code:firefox-3.0 -P
3 - Start Firefox 3.5 with this command:
Select the new profile and check if it works. If yes, then you might have a corrupted file in your old profile.Code:firefox -P
Also check the first item of the Troubleshooting section of the Firefox optimization and troubleshooting thread
Terminal readout for commands;
acro@acro-desktop:~$ ls ~/.mozilla/plugins/
ls: cannot access /home/acro/.mozilla/plugins/: No such file or directory
acro@acro-desktop:~$ ls /usr/lib/xulrunner-addons/plugins/
acro@acro-desktop:~$ ls -l /home/acro/Desktop/firefox/plugins
-rwxr-xr-x 1 acro acro 15824 2009-06-24 10:17 libnullplugin.so
Could be that the version actually running isn't the one downloaded? Might be worth a check of help -> About to see what version number is running.
No it was definitely 3.5 running, I checked Help>About Mozilla Firefox.
I guess it must be something new, as I just tried it out myself.
Firefox must come already looking for plugins in the /usr/lib/mozilla/plugins folder, as those are the only plugins it appears to see without an explicit symlink (in my case, VLC and Flash, and that's it).
If I do an explicit symlink to the /usr/lib/xulrunner-addons/plugins directory, then it gets VLC, Flash, Rhythmbox, and printer plugins as well.
I'm still going to recommend people do an explicit symlink instead of relying on Firefox to magically discover existing plugins. Ubuntu doesn't always dump plugins into the /usr/lib/mozilla directory, and Mozilla may not always have Firefox magically detect existing plugins in that directory.