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"Security Sandbox is disabled" pop up under toolbar

I recently opened Firefox to see a new flagged warning under my toolbar that says "The security sandbox is disabled. Your configuration is unsupported and less secure." … (read more)

I recently opened Firefox to see a new flagged warning under my toolbar that says "The security sandbox is disabled. Your configuration is unsupported and less secure."

I have gone into about:config and adjusted every security.sandbox element to see if that would change anything; it did not.

I am running on Windows 11 Home so I cannot install or properly run Windows Sandbox.

I would either like a solution to enable the sandbox once again, or just remove the notification from the toolbar.

Asked by Willow 1 day ago

Last reply by Willow 4 hours ago

Фризы в firefox 142 Red OS 8 Raspberry Pi 5

При заходе на сайте ya.ru и если на нём имеется строка с видео или поиск с алисой, то начинаются сильные фризы. Это ошибка именно в firefox 142, проверенно. … (read more)

При заходе на сайте ya.ru и если на нём имеется строка с видео или поиск с алисой, то начинаются сильные фризы. Это ошибка именно в firefox 142, проверенно.

Asked by MiG31BM 2 months ago

Last reply by MiG31BM 2 days ago

Tabs ordering in sidebar

Hi there! I find the new sidebar (on the left for me) a great addition but is there a way to reverse the "top to bottom" tabs displaying order? Not a way to move tabs, b… (read more)

Hi there! I find the new sidebar (on the left for me) a great addition but is there a way to reverse the "top to bottom" tabs displaying order?

Not a way to move tabs, but a setting allowing, when opening a new tab (Ctrl+t), to place (and display) the icon on top of the tabs icons pile, not at the bottom.

I get that it's the opposite of the normal reading direction, but it's rather unnatural to go looking at the bottom of the screen for recently opened tabs, IMHO.

Thanks in advance if you can address this, or show me where I can find such setting.

Best regards from France, Jc

Asked by agojc 6 days ago

Last reply by agojc 5 days ago

Oct.14.2025 Update: Weird white boxes on dark mode

After the update on the 14th, dark mode has gained weird stylistic choices that I cannot find a way to alter: namely, when closing a new tab, a white box with black font … (read more)

After the update on the 14th, dark mode has gained weird stylistic choices that I cannot find a way to alter: namely, when closing a new tab, a white box with black font appears -as opposed to the previous darker toned grey/purple with white font. However as of writing this post, I notice that dark mode is not working on this webpage. Seeing as I have an extension enabled in addition to the basic dark mode selection in Firefox settings, I can only imagine that something was broken in the update. Please advise, the change is jarring.

Asked by elvenbiv 1 month ago

Last reply by elvenbiv 6 days ago

obscure logins.corrupt

Hi a few weeks ago i had the problem that my firefox-stored-passwords are gone and there are files named logins.json.corrupt and logins.json-1.corrupt to -4 The in dir… (read more)

Hi a few weeks ago i had the problem that my firefox-stored-passwords are gone and there are files named logins.json.corrupt and logins.json-1.corrupt to -4 The in dir backup was also corrupt. File length 122 -123 kb all nulls. If i look at the dates first to last, they span two weeks were i didnt notice the problem. PC is always hibernated after work. Except for one which i imported just before from edge at the end of the two week span No problem: logins replaced by external backup as i found here at the forum.

But: How can Firefox produce multiple corrupt files without noticing me? (I have saved them for reference) In that two weeks span logins using firefox passwords obviously worked. (I dont remember the details)

Then some updates and reboots. No problem. But after work i do always hibernation

TODAY: PC didnt survive hibernation. logins and in-dir backup are corrupt again.

What about a) checking better if something is going wrong (obiously you do something because you rename the files for some reason) b) Noticing the user c) And how on earth this can go wrong in the first place.

Now for the obscure: Both times somebody has just before posted something against the greatest President of all time at Fux Nus using this pc. Backdoor possible?

Thanks

Edit: Using Windows, no other problems with storage on the 1TB Samsung ssd

Asked by msecker 5 days ago

Last reply by msecker 10 hours ago

Overworking Firefox

Hello I am having major problems with Firefox at the moment and have done for a while. I curently have four pages open but as you can see from the attached screen shot o… (read more)

Hello I am having major problems with Firefox at the moment and have done for a while. I curently have four pages open but as you can see from the attached screen shot of my Task Manager, there are 14 Firefox processes. The usage is OTT on memory and everything else. Could you tell me why this is happening? Currently it is running in Troubleshooting mode but that is not doing anything to improve the problem. It has been known to shut my computer down, as it gets too hot. I run on Windows 10 and Bitdefender is my security. All help is gratefully received. Thanks Lisa

Asked by lisa__bridge 1 week ago

Last reply by lisa__bridge 6 days ago

Windows 11 maximized window leaves a gap at the top

recently Firefox has started leaving a small gap at the top of the window with the desktop background (the light blue in the screenshot) is visible when the window is max… (read more)

recently Firefox has started leaving a small gap at the top of the window with the desktop background (the light blue in the screenshot) is visible when the window is maximized.

This issue doesn't occur with any other program and occurs in troubleshoot mode.

Asked by Tokkitsune 1 day ago

Last reply by Tokkitsune 5 hours ago

Update to new version crashes endlessly

Tonight I received a notice that a new version of Firefox was available and asking if I wanted to download it. It showed me the new Kit mascot so I decided to let it inst… (read more)

Tonight I received a notice that a new version of Firefox was available and asking if I wanted to download it. It showed me the new Kit mascot so I decided to let it install. It seemed to install normally but when it tried to open what I guess is a welcome/new features page, it crashes, and just showed a prompt to try again. This continued in an endless loop and I had to shut it down. Unfortunately I no longer had a functioning version available that I could find so I downoaded the ESR version to be safe (ver 140.5.0esr) which I am now using. Somehow I was able to recover bookmarks and hopefully other saved info. Can anyone advise what has happened? I have used Firefox for many years and never had this sort of problem before. Running Windows 11 on a new Dell i7 PC.

Asked by Greg_Beau 1 day ago

Last reply by Greg_Beau 1 day ago

Having to repeat logins on many sites

Unlike before, many sites that I visit regularly, I am now having to log in every time I visit, including support.mozilla.org. Did I unknowingly change something, some s… (read more)

Unlike before, many sites that I visit regularly, I am now having to log in every time I visit, including support.mozilla.org.

Did I unknowingly change something, some setting? or perhaps it's due to an addon?

Asked by noel_envode 4 days ago

Last reply by noel_envode 1 day ago

145.0 update problem

After the 145.0 update when I start Firefox both the menu bar and the top bar with the exit icon are missing. This is the first issue I've had since using Firefox when th… (read more)

After the 145.0 update when I start Firefox both the menu bar and the top bar with the exit icon are missing. This is the first issue I've had since using Firefox when the new revision was in the 20's. Per some quick Support research, I press F 11 twice (NOT once) to restore the screen to include the top bar with exit icon and menu bar with my Windows task bar showing (as normal for the past 2 decades). When I close out Firefox in less than full screen mode and then start up Firefox again, it properly includes both the top bar with exit icon and the menu bar. HOWEVER, if I close Firefox in full screen and then restart, I am missing the top icon bar and menu bar... again. Press F11 twice and the bars are back to square one. HOW DO I FIX THIS SO I DON'T HAVE TO PRESS F11 TWICE ON EVERY STARTUP TO RESTORE MY SCREEN?????? WHY DID YOUR RECENT UPDATE CHANGE MY SCREEN SETTINGS?????

Asked by m.reinholt 7 hours ago

Last reply by m.reinholt 5 hours ago

Firefox tab crashing

Firefox tab crashes whenever I try to open Firefox. I have AOL and Firefox browser. I've tried the close and reload, restart laptop, and redownloading Firefox to no avail… (read more)

Firefox tab crashes whenever I try to open Firefox. I have AOL and Firefox browser. I've tried the close and reload, restart laptop, and redownloading Firefox to no avail. However, I was able to open my AOL and email. I reached this help page using Edge.

Asked by daveprevar 3 days ago

Last reply by daveprevar 3 days ago

Data Tables open but close immedaitely

I have an Investors.com account and a feature they offer is a stock sector data table that shows recent performance and other information. When I try to open these tables… (read more)

I have an Investors.com account and a feature they offer is a stock sector data table that shows recent performance and other information. When I try to open these tables they close immediately, but if I use my tablet with a different browser they will remain open. I believe this is a simple setting that I need to adjust, but I don't know enough to figure it out.

Asked by dgardelldarin 2 days ago

Last reply by dgardelldarin 2 days ago

Firefox keeps freezing/crashing after a few minutes of usage.

26200.6899 - Windows 11 pro OS version 144.0.2 (64-bit) - Firefox version After a few minutes of usage, firefox keeps freezing and crashing. Very frustrating. Seems to … (read more)

26200.6899 - Windows 11 pro OS version 144.0.2 (64-bit) - Firefox version


After a few minutes of usage, firefox keeps freezing and crashing. Very frustrating. Seems to have started happening after recent OS upgrade.

Asked by m.perrott 1 week ago

Last reply by m.perrott 6 days ago

Lost all bookmarks and passwords after update.

After most recent update all my bookmarks and passwords disappeared and I cannot seem to recover them. This is extremely frustrating. Has anyone else had this happen? I t… (read more)

After most recent update all my bookmarks and passwords disappeared and I cannot seem to recover them. This is extremely frustrating. Has anyone else had this happen? I tried using the recovery process but it did not work.

Asked by fehollis 3 days ago

Last reply by fehollis 3 days ago

Can't remove shortcuts on my homepage

Hi! So I just installed firefox and I got onto annoying issue. I like using shortcuts on my homepage, but I started to get some shortcuts added automatically and they bot… (read more)

Hi! So I just installed firefox and I got onto annoying issue. I like using shortcuts on my homepage, but I started to get some shortcuts added automatically and they bother me a lot. I tried removing them or deleting from history, but as soon as I click the button, one shortcuts gets removed and immediately gets swityched with another one automatically. So I'm stuck in the infinite loop of removing shortcuts and my manually added ones just get lost in all this mess.

Asked by bul_yeou 3 days ago

Last reply by bul_yeou 3 days ago

Profile, history and everything deleted after most recent Firefox update

Hi, there. After performing the most recent Firefox update, I was greeted with the "create a new profile prompt", rather than having it open my old one. When going to "a… (read more)

Hi, there.

After performing the most recent Firefox update, I was greeted with the "create a new profile prompt", rather than having it open my old one. When going to "about:profiles", ALL FILES in the Root Directory of my old, default profile have the same date as the update, or after. Not a single file is older than that and all my history and bookmarks are gone. The option "Restore Previous Session" was not shown after the update.

PLEASE HELP!!

Thank you.

PS: This happened on a Macbook Pro. All other profiles are the same as they were before the update, having kept all history and bookmarks.

Asked by privatememail 2 days ago

Last reply by privatememail 2 days ago

Some (nearly all) youtube videos will not play

The problem seems to have started after a browser update. Running up-to-date Windows 10. This issue does not occur when using Edge. Youtube videos are blank (spinning). … (read more)

The problem seems to have started after a browser update. Running up-to-date Windows 10. This issue does not occur when using Edge. Youtube videos are blank (spinning). Sometimes it results is a still frame, other times it spins forever. Many times, you can see a series of stills in the video as the time line is dragged from the beginning to the end of the video. A small number of videos will work, but I have not been able to predict which will work or why. A different Win 10 machine on the same network is fine. I have tried all of the solutions I could find searching on-line (clearing cache, cookies, reboot, restart, update browser software, etc, multiple times). Checked settings in windows, firefox and youtube looking for something. Any help would be appreciated. Have used Firefox for decades and I don't want to be forced to change browsers.

Asked by sayaaah 4 days ago

Last reply by sayaaah 2 days ago