We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

How can I uninstall FF4 and go back to FF3.x?

  • 3 valiny
  • 48 manana an'ity olana ity
  • 2 views
  • Valiny farany nomen'i TonyE

more options

I have nothing but constant issues with video not running, my Google Analytics page freezing up, Facebook lagging, and other weird and annoying garbage with Firefox 4 that I never had with previous versions. Not to mention that it seems to use 3 times as much memory as the older versions. I just want to uninstall it and go back to 3. And if I can't do this I'm going to Chrome.

I have nothing but constant issues with video not running, my Google Analytics page freezing up, Facebook lagging, and other weird and annoying garbage with Firefox 4 that I never had with previous versions. Not to mention that it seems to use 3 times as much memory as the older versions. I just want to uninstall it and go back to 3. And if I can't do this I'm going to Chrome.

All Replies (3)

more options

To downgrade to Firefox 3.6 first uninstall Firefox 4, but do not select the option to "Remove my Firefox personal data". If you select that option it will delete your bookmarks, passwords and other user data.

You can then install the latest version of Firefox 3.6 available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your current bookmarks, passwords etc.

To avoid possible problems with downgrading, I recommend going to your profile folder and deleting the following files if they exist - extensions.cache, extensions.rdf, extensions.ini, extensions.sqlite and localstore.rdf. Deleting these files will force Firefox to rebuild the list of installed extensions, checking their compatibility, and reset toolbar customizations.

For details of how to find your profile folder see https://support.mozilla.com/kb/Profiles

Novain'i TonyE t@

more options

HOW do I uninstall ff4?

more options