Firefox Community Forum

I've loved Firefox for years but can no longer use it because I have been unable to resolve this issue. All was well, an update was done, and bingo, I got this message. I don't know how to fix it. I removed Firefox from my desktop and re-installed. Same problem.

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem."

Firefox has stopped working about 5 times in the last few days while browsing? sometimes on Youtube sometimes it just completely freezes and wont even close with task manager I had to force my pc to reboot yetserday because it wouldnt respond, my pc is rock solid stable while doing anything else including gaming and is 16 months old and have never crashed even once???

Hi I have lost all my browsing history and nothing I browse is saved. Also all my bookmarks have disappeared and I can't save anything even clicking on the star doesn't do anything I have quite a bit of stuff bookmarked, can you help? The browsing history and my bookmarks seemed to disappear at the same time.

When logging in to a website that I use many times every day all day, all of a sudden I log on and all I get is a blank white screen. I have tried clearing everything, restarting Firefox, removing Firefox and re-installing it, rebooting the computer, starting Firefox in the safe mode but no change. The same problem shows up on three different computers on two different networks with two different ISPs. The website opens normally on Edge and Chrome. I would prefer to be able to use Firefox. Using version 139.0.4 (64-bit) on all three computers. I would really appreciate any help that is available.

im using firefox on ubuntu, version 139.0.4. when i browse the internet using firefox, every some time the toolbar and the search bar "freeze" - i am unable to click anything, from the url, to any of the buttons. it takes up to like 1/2 minutes for the search bar and the toolbar to work again. i never had this issue before, neither on ubuntu (and other linux distributions), nor on windows...

Hello. Why doesn't Fiery Fox release a portable version of the browser? What if everything was in one folder and didn’t shit throughout the entire system?

We kindly ask you to start releasing a portable version.

Thanks for your understanding.

Best wishes.

Was reviewing my Settings. Looked under Privacy & Security, Browser Privacy, Certificates, View Certificates. The Certificate Manager has many listed under “Authorities.” Some look suspicious. How do I determine which are valid and which should be deleted?

Hi,

I’m using the latest version of Firefox on Windows 11 (currently v126.0), and I’ve noticed a recurring issue: the browser freezes for a few seconds when I switch between tabs, especially if one of the tabs contains a media-heavy website (like YouTube or online editors).

The browser doesn’t crash, but becomes unresponsive for 5–10 seconds before catching up. Task Manager shows a CPU spike during the freeze. I’ve tried the following:

-Clearing cache -Disabling all extensions -Running in Troubleshoot Mode -Updating graphics drivers

None of these solved the issue.

Is this a known problem? Any suggestions on how to fix or further debug it?

Thanks in advance!

I just need some help to stop techlorex from popping up as its constant and all day every day, There is no app and I search the system but nothing comes up, It pops up on one app I delete the app and it comes up on another one. Has enyone else had this problem and did you find a solution? Many thanks.

Hi is many day i try to connect to chatgpt but return me this , (see attach foto ), is possible remove a check controll of certificate , is very useless and boring

thanks

Are their any plans anyone knows off to create a version of Firefox that supports the ability to use FileSystemAPI on directories.

The current one won't work with a BeatBuddy project and SD cards that are saved on my computer using their online editor - https://bbmo.singularsound.com/ - which forces me to use another browser for that...

The Firefox version I used before was Mac version 136.0 After I updated to the latest version, I found that the fonts of the browser's tab bar, search box, and bookmarks became significantly larger. How can I change the font size?