Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

I deleted some apps in Firefox 4, opened 3.6, closed it, and opened 4 again. But now Firefox 4 is having some severe problems.

  • 2 replies
  • 3 have this problem
  • 1 view
  • Last reply by DaveRo

more options

After doing what I described in the thread title, Firefox 4 presented the following issues: 1- Tabs would not close. 2- The "forward" and "back" button would not be lit or clickable, as if I didn't visit any websites. Although pages did load, I could not go back and forth between them via these buttons. 3- the "feedback" button in the right-hand side of the screen was completely gone. Trying to download the respective feedback app that Mozilla provides didn't work, it wouldn't download. 4- the App Management screen would not open. 5- I did not save any of the pages from the previous session. So I closed FF 4 and opened 3.6 once again (wich appears to be functioning normally) and the pages came back

So basically my FF 4 got completely messed up. Reinstalling it did nothing. Cleaning the registry with Registry Mechanic was to no avail either. I had to uninstall FF4 since it was unusable.

Possibly useful fact: The apps I had removed in FF 4 were also removed in 3.6, wich indicates that maybe the FF 4 installation did not create copies of it's own for the bookmarks, apps, cache etc, so I am afraid to delete those when the FF 4 uninstallation wizard prompts me to, as it would also probably delete the stuff I have in 3.6 .

This happened

Every time Firefox opened

== Started after using Firefox 3.6 then switching to 4 again.

After doing what I described in the thread title, Firefox 4 presented the following issues: 1- Tabs would not close. 2- The "forward" and "back" button would not be lit or clickable, as if I didn't visit any websites. Although pages did load, I could not go back and forth between them via these buttons. 3- the "feedback" button in the right-hand side of the screen was completely gone. Trying to download the respective feedback app that Mozilla provides didn't work, it wouldn't download. 4- the App Management screen would not open. 5- I did not save any of the pages from the previous session. So I closed FF 4 and opened 3.6 once again (wich appears to be functioning normally) and the pages came back So basically my FF 4 got completely messed up. Reinstalling it did nothing. Cleaning the registry with Registry Mechanic was to no avail either. I had to uninstall FF4 since it was unusable. Possibly useful fact: The apps I had removed in FF 4 were also removed in 3.6, wich indicates that maybe the FF 4 installation did not create copies of it's own for the bookmarks, apps, cache etc, so I am afraid to delete those when the FF 4 uninstallation wizard prompts me to, as it would also probably delete the stuff I have in 3.6 . == This happened == Every time Firefox opened == Started after using Firefox 3.6 then switching to 4 again.

All Replies (2)

more options

I assume by apps you mean add-ons or extensions or plugins. These are held in the profile.

Unless you set up a new profile, then FF4 and FF3 would be using the same one.

http://kb.mozillazine.org/Profile_folder_-_Firefox

When I test a beta I always use a new profile, or update one from a previous version, but I would never expect the profile to be usable again in a previous version of Firefox.

Since FF4 has a new add-on manager it doesn't surprise me that FF 3 won't work with a profile that's been modified in FF 4.

more options

"Since FF4 has a new add-on manager it doesn't surprise me that FF 3 won't work with a profile that's been modified in FF 4. "

Thanks for the answer.

As I have stated in item 5 of my post, FF 3 is functioning normally, it's FF 4 that's not working right anymore and presenting all the issues listed.