Mar 06, 2012 11:49
Ever since Ubuntu upgraded Firefox from 3.5.x (I think) to 10.0.2, I experienced extremely sluggish behavior. With several tabs open FF would hang for 10 or more seconds when switching between tabs and scrolling down a page.
I finally found the fix. Under
Tools->Add-ons->Languages
I disabled "English (GB) Language Pack" and "English (South Africa) Language Pack"
Restart Firefox and problem fixed.
If it matters, I'm still running Ubuntu v10.04 LTS, but I think it's a Firefox issue.