Firefox Community Forum

After viewing a livestream on Mozilla browser my screen locked up and I had to restart/reboot. When it reloaded all my settings and presets on my homescreen were gone or changed? How can I restore my mozilla settings and profile to an earlier time to reset to my original settings?

As of 12/9/25, Firefox seems to now prevent Theme add-ons from working if there is a contrast setting configured in Windows configuration. (Version 146.0) Previously, this allowed a very aesthetically pleasing view. I would greatly enjoy having that option again. Thank you.

12/10/25 am my yahoo bookmarks are opaque. they are still there just not visible until you click on them. Later 12/10/25 I rolled back firefox to earlier time and all looked correct again. today 12/11/25 opaque bookmarks again.

Selecting "Help About Firefox" causes the window to appear but this window then freezes with no information. It is possible to close the window and continue with Firefox. This happen nearly always but occasionally works correctly. Current Firefox version is 146.0 but the problem is not limited this version. System is Kubuntu 24.04, KDE Plasma Version 5.27.12 and QT Version 5.15.13 I have tried several things. Deleting the .Moziila folder will permit the window to work once but after a restart stops working. Any new things to try would be appreciated.

I had to have my laptop serviced. When it came back, I downloaded Firefox and logged into my account. Usually, all bookmarks and passwords would load back up, since they were bound to my account. Unfortunately, this time after had synchronization finished, none of my data was present. It's as if my whole account was wiped. The only thing I did was change my password. How can I restore everything?

I'm using W11 & Firefox/Mozilla 'Version 146.0 (64-bit)' in ‘Dark Theme’ - my sidebar bookmark in use is now 'highlighted in BRIGHT blue' which is VERY ANNOYING - can I get rid of this feature? Is there a way to adjust the highlight color/intensity? Please let me know. If there is no adjustment possible, please take care of this in your next version. Thanks, John

Hi Mozilla I hav got a problem with Firefox on Kubuntu 24.04.3. Everytime the computer is restarted Firefox crashes the first time it's started. That's not a big problem, starting Firefox again don't take long. But the problems is exceeding. If i start Firefox by clicking a link in a mail in Thunderbird. And Firefox has not yet been started, It crashes, but now it's also invaliding the Task bar on the screen where Firefox was started. Invaliding means that I cannot start apps from that screens taskbar, and the clock has stalled, none of the tools works etc. The only possibility solution I have been able to figure out, is restart (It's like going back to Win 98). Sometimes I am able to start a app from that invalid taskbar. But it's not the one app that i clicked on. Even though I can trigger it via Thunderbird, the invaliding of the taskbar will occur after a while. And I have to restart. I am not sure if this is the right place to post. But Firefox is always involved, but maybe Thunderbird or Ubuntu was the right place? Every time Firefox crashes there is send a crash report to Mozilla, but is has been going on for a while, so i guess that nobody is looking at the crash report. If I use Chromium instead of Firefox I don't see the problem.

Svp, comment changer la couleur de la barre latérale ?

La mienne était toujours blanche, mais vient de changer à mon insu pour du bleu ...

Merci de m'aider.

I have been having trouble entering information or accessing certain websites. This has been getting worse regularly. Either I can't sign in, using manual or saved information in my password keeper, or I can't enter information on sites on which I'm trying to make a donation, such as my address. Or it will do that and then not let me enter credit card information, again either automatically or manually.

Note that I then have to open a different browser, and then I have absolutely no trouble. If these problems aren't fixed, I will have to stop using Firefox as my default browser, which it has been since its beginning. Please advise.

When a PDF document is dragged into Firefox, you get an app that allows you to write on it, import images, highlight, etc. However, if I use grouped tabs, you cannot use the app anymore. It will not write on grouped. I'm not sure where this issue would fit in the options provided. Thanks for any help you can give.

All these years, when I bookmark a page, that bookmark used to, then, be at the bottom of bookmarks. I assume that means the bookmarks were sorted by the date they were bookmarked. Lately, that is completely gone. When I bookmark a page, who knows WHERE it sits in that long bookmark list?!? It's THERE if I search on it but it used to be so handy... it was right there at the bottom of the bookmark 'manage' page!! Am I missing a date tag or something??? SO annoying. Thanks.

I recently installed v. 146 for both FireFox and Thunderbird on my laptop which is running Windows 11 Pro (Version 25H2 / Build 26200.7462). Since the upgrade to v. 146 I have been unable to use my older HP printer (Laserjet 2300d) on both products. When I try to print a browser page or e-mail using either the printer icon or the "File/Print" menu selection, the print dialog comes up like normal. However, when I click on the "Print" button, my screen flashes, the dialog box disappears, there is no indication from the printer that a file has been sent and no document is found in the print queue.

My newer HP printer/scanner (Officejet Pro 8130)works fine, as does printing to my older printer from MS Edge. So, the issue is with the Mozilla products. Using "Troubleshooting Information" and clearing the Printer cache has not resolved the issue for either FireFox or Thunderbird. Nothing else like this shows up in the knowledge base.

Do I have to retire my older, but dependable and inexpensive to use, laser printer in order to continue using FireFox/Thunderbird or is there a software solution?

Previously, you could right click & copy an animated GIF from one site, and paste it into the comment field on another site. This would paste the full animated GIF into that comment section. It worked on all forums that support animated GIFs in comments.

It was very convenient to only have to copy a GIF, instead of having to manually save it in some folder, select upload image from computer, manually navigate to that folder, upload the GIF, open windows explorer, manually navigate to that GIF, delete that GIF.

Since 146.0 that no longer works on any site.

All you paste is a still image, taken the moment you right clicked the animated gif.

I have about a dozen computers synced to Firefox. The Bookmarks go nuts when an older seldom used machine powers up. I spend days cleaning out my bookmarks only to have old ones come roaring back. I have began manually backing my bookmarks up to a hard drive. Firefox has failed me. I wish to delete all, or some of the backed up bookmark files.

How do I do that!!! I've spent hours over weeks online trying to stop this madness. Can I wipe out all the files by deleting any of the three "places.sqlite files? Is there a way to selectively kill the very large files that keep coming back and keep the other recent backups?

Does someone sell a pay to play bookmark manager similar to Foxmarks / xmarks?

Thanks for your help Lee

I installed firefox on ubuntu 24.04 following the guidelines from https://support.mozilla.org/en-US/kb/install-firefox-linux

I followed the direction from the section "Install Firefox .deb package for Debian-based distributions", adding the https://packages.mozilla.org/apt repository, prioritizing that over firefox snap from ubunto repors and finally installing firefox.

All good, now I have the latest firefox.

Question: what entry should I add to the "Unattended-Upgrade::Allowed-Origins" section of "/etc/apt/apt.conf.d/50unattended-upgrades" in order to enable unattended upgrades for the mozilla repo?

Googling this got me different contradictory recommendations that did not get my system to firefox 146 until I manually run the apt update/upgrade.

Thanks!