Firefox Support Forum

Tell me how to "re" install my previous version of 113.02 and then fix this bug. Don't know where to get "old" versions to download and will old version just "install" right over the version installed and keep all the bookmarks, etc.?

I have clicked the 'always ask where to save download' box, but the save files to downloads is still active. How do I get it to ask me where to download to every time?

Pretty niche problem, but I couldn't find anyone else with the same kind of problem. Whenever I try to download a file with "%" on its filename, the "%" character gets changed to an underscore. Like say, if I try to download a file named "Skyrim 100% save file", it becomes "Skyrim 100_ save file". Not sure why this is even happening, but it only happens in Firefox. Not Chrome nor Edge.

Netflix quit working today. It said my browser version was no longer supported. I updated from v.86 to v.89. It looks like crap. New tab + icon is gone. "tab bar" is not transparent or dark mode. And guess what: Netflix still doesn't work. That's probably their problem but now I have no Netflix, weird crap on the whatever bar, add-on icons are gone, and this big gaudy tab bar.

How do I rollback to a previous version? I'd rather not have excuses or sales pitches as to why 89 is better from the newer-is-better crowd. For me 89 is NOT better.

So, how do I rollback to a previous version?

What setting will stop the constant notice "Download the latest version of Firefox." I don't want 20 notices per day. It's like having a child in the backseat "are we there yet?" "are we there yet?" "are we there yet?" How many times do I have to click the "Dismiss" button before this stupid software understands that I do not want updates? I've noticed that this is a common complaint. Stop the bullying by making people choose automatic updates. Many times things get messed up on my computer with updates and it is not worth the aggravation. Candace M.

Win10 with what was Firefox 89. I had already disabled the Proton UI on this installation, because it is horrible. Today Firefox decided to update to version 91. All of the Proton UI junk is back. I tried disabling it again, but nothing worked. Doing a web search, it appears that Mozilla has disabled the ability to turn off Proton.

I then set about to rollback the installation back to version 89. I found a Mozilla link on this, went to their ftp server and downloaded the installation files for the last version of 89. The installation went normally, but when I opened Firefox afterwards, a little box popped up saying something to the effect of "To keep your History and Bookmarks from possibly being corrupted, Firefox must create new user profile." I exited out of this and Firefox didn't start. I attempted to restart Firefox again and the same box popped up again. The only way to get past it was to click the accept button.

I did so and Firefox started. This was clearly not version 89. As the UI is junk, it took several minutes to find out that this was now the latest version of 92!!!! I'm absolutely positive that I downloaded the correct file. When I look through the update history, it doesn't even show todays version 89 installation as happening. What a piece of junk.

I then spent 20 minutes figuring out how to revert back to my user profile, not the new one that it had created for me. I then did some research on what had happened. Well it turns out that you can't actually rollback Firefox, despite what Mozilla says. For a while they have added "downgrade protection" which automatically creates the new user profile and stops your old profile from being accessed by it. So unless you want to figure out how to spend a hundred hours reconstructing bookmarks, passwords, settings, etc. it actually isn't possible to rollback Firefox. Doesn't this violate some Microsoft rules about being able to uninstall versions of software from within Windows? If you try to do this with Firefox and go back to a previous version it blows everything up.

Does anyone know how to actually rollback Firefox to a previous version, so that Proton can be disabled?

I have had this issue before and uninstalling and reinstalling has fixed it in the past. Today when I opened firefox it prompted me to update , which I did without thinking. Subsequently, it stopped working. I have tried: restarting my PC, running in troubleshooting mode( it wouldn't even open when I tried this), uninstalling and reinstalling using the internet installer, uninstalling and reinstalling using the offline installer ( tried on multiple hard drives, so I don't think hardware failure is the issue), installing an older version of fire fox, and installing the 32 bit version instead of the 64 bit version. The attached images show what displays upon trying to launch firefox. nothing loads, not typing an address into the search bar, not clicking on a bookmark, the only UI element that will display is the 3 horizontal line setting menu.

I cannot use firefox anymore. The program opens but will not search. Could this be because I downloaded Windows 11? I have tried many fixes. Nothing works. Thank You

I just installed the 'Mailcheck' version (mailcom_Firefox_Setup_64.exe)... Is there anyway to 'roll back' the update? Or do I have to uninstall and reinstall Firefox?

At one point I installed the newest version of Firefox on my MAC (Early 2008) running Catalina. I found it would not run as that release needs a newer MAC OS.

So I went back and installed Version 78. That did not work either. So I tried Firefox 10.0.11esr.dmg, 10.0.9esr.dmg, and even Firefox.45.9.0esr.dmg.

After install, I get the same message.

You can't use this version of the application Firefox with this version of OS. You have 10.11.6, This application requires 10.12 or later.

My theory is that even though I uninstall Firefox, some trigger file gets left behind and I get this error message no matter what version of Firefox I install.

Anybody have any ideas on how I can run an older version of Firefox?

I have hit the Sept 30 Certification issue with this old MAC and I hope Firefox will be a work around. - Thanks Rod

Same with