i want to roll ff back to 3.0, 4.0 and up is taking up to much space to run. since i have updated to 5.0 the problem is killing my laptop and i liked how well 3.0 ran, it didnt max out my cpu like 4.0 and up does.
firefox is using up to 90% of my PCU on my laptop. I spend more time twiddling my thumbs waiting for things to load or i watch my laptop crash from over heating. I did not have this problem with 3.0 and would like to go back to it, how do I roll back firefox to 3.0 so my laptop doesnt burn up ? i run vista on my laptop.
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In case your Firefox profile became damaged during the upgrade, or add-on is causing the problem, you could test whether a new blank Firefox profile cures those ills.
First, I recommend backing up your Firefox settings in case something goes wrong. See Backing up your information. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)
Next, close Firefox and fire up the profile manager to create a new profile: Managing profiles.
If that tests out, you can import your bookmarks and move your saved passwords over from your problem profile to the new profile. Recovering important data from an old profile.
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If that fails, here's the process to roll back:
First, I recommend backing up your Firefox settings in case something goes wrong. See Backing up your information. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)
Next, download and save Firefox 3.6 to your desktop for future installation. http://www.mozilla.com/firefox/all-older
Close Firefox 5.
You could install Firefox 3.6 over it (many have reported success) or you could uninstall Firefox first. If you uninstall, do not remove your personal data and settings, just the program.
Unless you have installed an incompatible add-on, Firefox 3.6 should pick up where you left off. If there are serious issues, please post back with details.
Note: I haven't actually tried this myself!