This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Mozilla Support में खोजें

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

I need to revert back to Firefox 3.6 The new version is not compatible with my Speedlings program. How can I get a 3.6 copy of Firefox? Thanks! Russ

  • 1 प्रत्युत्तर दें
  • 1 यह समस्या है
  • 1 view
  • के द्वारा अंतिम प्रतियुतर TonyE

more options

I originally had Firefox 3.6 and my Speedlings program was working fine with it. Then I updated to 4.0 and Speedlings is not functioning properly. I called Speedlings and they said to use the Firefox 3.6 version and I would be fine.

I originally had Firefox 3.6 and my Speedlings program was working fine with it. Then I updated to 4.0 and Speedlings is not functioning properly. I called Speedlings and they said to use the Firefox 3.6 version and I would be fine.

All Replies (1)

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