When Firefox is first installed, it generally appears pretty snappy. However, after a few months of regular use, it appears to get sluggish, even without any add-ons and clearing the cache, cookies, etc.
This slowing down is an ongoing issue I have experienced with Firefox and particularly gets bad after a year, especially with multiple tabs open. Even CCleaner appears to offer little improvement.
When I first ran into this problem several years ago, I decided to try uninstalling Firefox, deleting everything I could find Firefox related on my computer and reinstalled Firefox. The resulting improvement in Firefox was substantial, much like what you would expect from a clean OS installation. Then again, I had a much older rig at the time.
Although this issue is not as bad now with faster PC hardware, it is still surprising just how much better Firefox performs each time I clean the profile. The obvious catch is having to restore my bookmarks, sign-in anywhere I use ‘Remember Me’ and restore the odd add-ons I use (e.g. UK dictionary).
Here are the steps to remove Firefox’s profile:
[li]Backup your bookmarks - Launch Firefox, Press Shift+Ctrl+B, go into “Import and Backup” and select “Backup”. Save your bookmarks somewhere handy such as on your desktop.
[/li][li]Go into the Firefox Apps list and take note of any Apps you use or any settings configured on any app, as these will need to be reapplied when the apps are later reinstalled.
[/li][li]Completely close out of Firefox.
[/li][li]Go into Run (Windows Key + R), type in “%appdata%” and click ‘OK’.
[/li][li]Go into the ‘Mozilla’ folder and rename ‘Firefox’ to ‘Firefox.old’.
[/li][li]Go up two levels (AppData folder), then go into ‘Roaming’ and then into ‘Mozilla’. Rename ‘Firefox’ to ‘Firefox.old’.
[/li][li]Launch Firefox - It will now act like it is freshly installed. I’d recommend choosing the ‘Don’t import anything’ option when requested.
[/li][li]Go into bookmarks (Shift+Ctrl+B), go into “Import and Backup”, then “Restore” and “Choose File”. Choose the bookmarks file you saved in step 1.
[/li][li]Reinstall and configure any apps you would like to continue using in Firefox.
At this stage, Firefox should be pretty snappy again, at least for another few months.