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EVERY timne I open your damned rotten system I lose ALL my hundreds of vital bookmarks and it takes me half a day fiddling about to recover them STOP IT. For goodness sake you are ruining my life. STOP IT!!!!!!!

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I had an unusual system crash, and when I restarted Firefox, the History > Restore Previous Session feature was grayed out. Due to the nature of my work, I had a large quantity of tabs open at the time of the crash (please don't judge). I then backed up the contents of the \Library\Application Support\Firefox\Profiles\[session].default\sessionstore-backups\ folder, but unfortunately not the full Profiles folder content. The file recovery.baklz4 does seem to contain my open session info (I can see a recent link in it). Based on web advice, I then tried restarting Firefox, but that didn't solve my issue. I also tried copying in sessionstore-backups files, without success. I then tried the "Session History Scrounger" web application to try and recover links from the contents of recovery.baklz4 because that worked for me in a prior crash years ago, but it doesn't seem to work properly anymore (it only retrieved 4 web pages). Appreciate any guidance as to how I can use my backed up sessionstore-backup files to re-enable Restore Previous Session, or alternatively to scrounge the links that were open at the time of the crash. Greatly appreciate your help! (Please do not suggest using "Show All History"... I have no plans to sort through a dump truck of rice with a pair of tweezers.)

i have some problems with HDR settings on my firefox for mac when i watch a youtube video in the middle of video it kinda decrease the brightness or apply a gray filter on screen or something like that

Hi, Lately I haven't been able to add a bookmark icon on my 4-row new tab page. There's still to empty spots I would like to fill but can't find the usual + button. Thanks for the help

When using the built-in Firefox AI sidebar and clicking the "Summarize page" button, I consistently get the error: "431 Request Header Fields Too Large" from chatgpt.com.

Cookies were cleared multiple times Extensions (including AdGuard) were disabled The issue persists

Previously, changing a privacy setting temporarily helped: switching from "block all cross-site cookies" to "block cross-site tracking cookies and isolate other cross-site cookies". After that, the feature started working.

However, after restarting the browser today, the issue returned, and changing this setting no longer helps.

I would also like to note that currently there is no way to disable or hide the "Summarize page" button, even though I did not need it initially. I tried to configure things so it would work properly, but was unable to do so.

Steps to reproduce:

Open any webpage Open the Firefox AI sidebar Click "Summarize page" Observe error 431

Expected behavior: Page summary should be generated successfully.

Actual behavior: The request fails with HTTP 431 error.

Although I am using the latest firefox update and have cleared all firefox data and cookies it can take up to 30 minutes for facebook and instagram to load. When I switch to Google Chrome both facebook and instagram load instantly. What might be causing this? Thank you.

bold textEVERY TIME I OPEN A NEW WINDOW IT CREATES A NEW TAB. IT CREATES A LIST OF TABS I MUST THEN CLEAR. HOW DO I CHANGE IT TO REPLACLE MY CURRENT WINDOW INSTEAD?

Whenever I try to watch videos on websites such as onlyfans youtube, etc., the videos will not play since I installed firefox. I have to shut my computer down and start it all up for them to play. I googled how to fix this and I need to go to settings and scroll to performance and uncheck use recommended performance settings and uncheck use hardware acceleration when available but I can't find this to uncheck these items. Can anybody help me? TIA

If I have two or more tabs open it happens very often that all tabs which are not in use are closed independently by the browser. At the same time Firefox independently creates bookmarks from some closed tabs in the bookmark toolbar. I always use the latest version of the brwoser and no extensions. I would be grateful for a solution. Thanks!

All but 2 of my previous saved windows have been lost. They are not recoverable or present when trying to use "Recently closed windows." How could this happen? More importantly, how can I recover them? They contain numerous tabs that will be impossible to recreate from memory.

Issue: When Firefox starts after a system reboot, it starts on the incorrect desktop. This seems to be off by one; that is, I have Firefox assigned to Desktop 3 (using the Dock icon's Options menu). Under normal operation, it starts on Desktop 3, but after a reboot, it seems to start on (more recently) Desktop 2 or (earlier) Desktop 4. Unsure about what causes it to prefer 2 vs. 4.

This seems to happen after I've shut down (quit Firefox normally, shut down without reopening windows on login, power goes off, power on, log in, then click on the Firefox icon in the Dock) or after a system update (which reopens windows on login for me after rebooting and installing the update). It does not seem to happen after a Firefox update or after quitting Firefox normally and then restarting it from the Dock icon right away.

Pretty irritating, as I have major applications assigned to specific desktops, and Firefox is the only one that seems to forget which desktop it should be on.

Details:

Firefox 150.0.3 (aarch64):

• Settings > General > Startup > Open previous windows and tabs > TRUE (checked)

macos 26.5 (25F71) Tahoe:

• Settings > Desktop and Dock > Mission Control:
• ---> Automatically rearrange Spaces based on most recent use: FALSE
• ---> ...switch to a Space with open windows for that application: TRUE
• ---> Group windows by application: TRUE
• ---> Displays have separate Spaces: TRUE
• Dock > Firefox application icon > [Right Click] > Options > Assign To > This Desktop (i.e., Desktop 3)
• Apple Menu > Shutdown > Reopen windows when logging in: FALSE

MacBook Air M4 2025 24 GB RAM:

• No external displays connected

When I try and access a streaming service (ABC iView) I see the start of the video as a single image which is still and doesn't play - audio is working fine - what is the issue?

When I login to Google, I'm usually asked to do more than 1 catcha. Sometimes, they continue until I can't do any more and use Google Chrome. I have poor eyesight, and this is getting very annoying.