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.

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

FF 4.0 incompatible with Norton 360. How do I uninstall 4.0 and go back to 3.6?

  • 2 பதிலளிப்புகள்
  • 5 இந்த பிரச்னைகள் உள்ளது
  • 18 views
  • Last reply by mangando

I want to back out of FF 4.0 and go to older version 3.6 because I cannot use Norton 360 that I absolutely need and rely on. Can someone send a link about how to uninstall 4.0 and reinstall 3.6?

I want to back out of FF 4.0 and go to older version 3.6 because I cannot use Norton 360 that I absolutely need and rely on. Can someone send a link about how to uninstall 4.0 and reinstall 3.6?

தீர்வு தேர்ந்தெடுக்கப்பட்டது

Symantec are working on updates to make their add-ons work with Firefox 4. pending this, to revert 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

Read this answer in context 👍 2

All Replies (2)

தீர்வு தேர்ந்தெடுக்கப்பட்டது

Symantec are working on updates to make their add-ons work with Firefox 4. pending this, to revert 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

Thank you for the feedback. Your advice worked. I successfully uninstalled FF4.0 and reinstalled 3.6. Everything functions as before.