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System Software: Win11Ent_x64 v22H2 (b: 22621.2283) MFF v18.5.0.0

No matter what I try, my MFF keeps crashing at startup. For some reason, it tries to open 2 pages the windows at the same time, which is illogical. I deleted firstly my: sessionstore.jsonlz4 logins.json to no avail.

Then I tried to open MFF through elevated CMD with the command: C:\Program Files\Mozilla Firefox\firefox.exe -safe-mode Again, 2 windows pop crashing immediately.

I do not understand why all of the sudden, it tries to open 2 different instances at once. This makes no sense. I am out of ideas, having tried many an option found on Google, but which none give me a solution.

If anyone has an idea, I would be quite darn thankful. This MSEdge crap that I need to use now is not quite my thing.

Thank you. Ke'Ylan

I have been a Firefox user for most of my time on a computer and that's a lot of years. A regular site I visit is Townhall.com. A few months ago I could no longer play videos because the link (video screen) would not appear. The text below where the screen should have been appears. I worked with Townhall on this and we could not solve it. Interesting was that periodically the link would appear but now doesn't appear at all. So I am forced to use MS Edge for Townhall videos.

Then it happened on another site I frequent - RacerX.com. When I try to play a video I get a blank screen with the message: "Unfortunately your Targeted Advertising privacy settings prevent us from showing you this YouTube Video. Please update your consent to see this content." I cannot find anything in settings which should cause this. I changed nothing. Settings are the same as they've been for years. So now for RacerX videos I have to use MS Edge.

I would prefer to continue to use Firefox as my browser but switching back and forth is not productive. As much as I do not want to make MS Edge my default browser it looks like I will have no choice unless you can help me solve this issue.

This has been happening to me with recent updates of Firefox, and I am very close to dumping a browser that I have used for years because of it. I go to load pages and it just sits there and spins and spins. In the time I take to open another browser like Chrome and copy and paste the exact same links into Chrome, where the download of the web page is practically instant. I go back to Firefox and it is still spinning and it is just ridiculous. I have no clue what would be causing this. After it finally loads a page, it seems fine on subsequent loads of pages.

Hello Firefox Support Staff,

I use Firefox on a Windows 10 desktop PC.

Firefox often crashes when I close the browser by clicking the X either at the top right or the tab.

Please let me know the type of information you need to debug.

Thanks, Sam

firefox is my goto browser-tons of bookmarks etc-always kept UpToDate along with my dell MS10 laptop - today laptop boots up fine, outlook and MS edge work fine, but firefox will not start up, even in Administrator mode - searched for help - tried the run command firefox.exe -p, and also tried to create new profile ( as suggested ) that didnt work either- i would hate to uninstall and reinstall ! any help besides that ?

I am using the latest version of Firefox with Mojave on a Mac.

Lately I have experienced slowness despite the fact that I didn't add any software and I have Norton checking for viruses. Recently I got a message "Your system has run out of application memory" when I had 5 tabs open in Firefox. I checked Activity Monitor and it showed Firefox using 1.16 GB. 7 other apps were open, the next one with the highest memory usage was Mail (465 MB). Activity Monitor showed 30 instances of FirefoxCP Isolated Web Content entries.

I attached a screen capture showing what Firefox was using in one of these instances. Is this "normal" with 5 tabs open?

I closed the open tabs and quit Firefox. Memory usage by Firefox went down, but after a short time the problem happened again.

A search on the internet showed lots of similar complaints about FirefoxCP Isolated Web Content. Is this a known bug? Any way to avoid this problem?

Thanks.

I am using Mozilla Firefox 64-bit with version 107.0 on Windows 10 21H2. I connect very often to HTTPS websites without a valid certificate. Often with certificates issued by themselves. Before it was always enough to say "I trust this website" once. Now the question comes again and again, whenever I connect. What could be the cause of this?

I've encountered a very weird behavior: when selecting where to save a file or selecting a file to upload, the browser hangs 100% of the time.

Even when I go to about:memory, click Load, the path selection window appears - regardless of whether I select a file or close the window, the browser hangs and the window stops responding. I tried waiting for several hours - to no avail. Only restarting helps. Same with the upload selection window - regardless of whether I selected a file to upload or closed the selection window, the browser hangs. Before freezing permanently, the mouse cursor stops moving, then lags around a bit before recovering.

I tried cleaning download history, cache, recreated profile, restarted without extensions, in safe mode, disabled antivirus - always the same result.

Please advise me, maybe someone has encountered something like this - I really don't want to start using Chrome. My OS is Windows 11. Thanks in advance.

I've noticed this issue happening randomly, some of my toolbar bookmarks listed on the sidebar just up and disappear from view. As if they were never there. But I know they're still saved because when I click to Manage Bookmarks and check them there, they show up fine. The toolbar just randomly hides them for whatever reason, and I can only fix it by closing Firefox and opening it again.

I'm on the current version. I remember accessing about:support and clicking on Verify Integrity while trying troubleshoot some other issue, but don't know if that could've caused it though.

On my laptop (121.0 on doze 10) I have no problems but on my desktop Firefox (121.0 on doze 10) started to struggle with Google a few months ago. Sometimes the Google site doesn't load, sometimes it loads but doesn't connect (no auto-complete, no search) and if it does work the result links often don't load when clicked. It's like Google falls asleep and then, when it wakes up, all is fine, until it nods off again. I have followed advice provided, cleared cache, cleared cookies, removed plugins and extensions, reinitiated and reinstalled. Running in safe mode seems to help, as in pages seem to load faster, but sadly does not eliminate the problems. Other browsers on this machine are not affected. No time sync issues.

Any suggestions?

TIA

Hello there. Ever since the latest update (to 115.0.2), I've been experiences random crashes. It's only happening with these 2 sites: https://www.mapsofworld.com/ and https://www.buongiorno.sk/ (there may be more but I haven't discovered any others as of yet). I open the sites and FF immediately shuts down. And then, after I restart it, there are no crashes listed in the logs (about:crashes). I've tried everything. Cookies, cache, a "refresh", a fresh install and I've also checked my system and HDD for errors but nothing helped. Any idea what I should do? The problem seems to be on your side, not mine

I play a game at Vegas World. It's basically a free online slot machine site. I have played it for years with Chrome. Recently switched to Firefox. Playing an auto spin slot game, Firefox gets slow and hangs after about 25 spins. Chrome will go for 10,000 spins. So, Firefox is useless on game sites. I don't really expect a fix or solution. And I don't actually expect to use Firefox by the end of the day.

I frequently try to save pages as PDFs. When I print the page directly to a printer, no problem. When I save the PDF, it's usually munged and not a valid PDF file (very small or 0 bytes). Example URL: https://www.nytimes.com/2019/07/01/science/bacteria-microbes-electricity.html

Makes an empty PDF while when I do Print and then Save as PDF. I'm on Apple OS 10.13, using Firefox 67.0.4. This problem has been with us for a while (> 1 year I believe) and happens on all my machines.

Good Morning. I have been using Firefox for 20+ years. Last night it did an update overnight, and this morning I am getting "The Page Isn't Redirecting Properly" error message on my business CRM site. This appears to be the only site having an issue. I have never had this error previously.

I tried all suggestions already including clearing cache/cookies, checking settings, delete history, troubleshoot mode and nothing. The site opens fine on Chrome and MS Edge.

Any additional help is appreciated, this is very frustrating.

Thank you.

Windows 10, Firefox 123.0 (64-bit)

It's so bad that I might have to stop using it entirely.

I've tried creating new profiles, disabling all add-ons, and disabling Enhanced Tracking Protection; none helped.

https://drive.google.com/file/d/1DX19hX88Hz_XUbsd0dAljiiiKY_XUUN_/view

As you can see in the video (about the 00:16 mark) it randomly stops properly loading pages from the website, even in new tabs. The only temporary remedy is to either close and re-open FF, or press Ctrl+F5 (which I did at the end of the video).

I must add that it can happen even when loading the website for the first time in the session.

I recently made the switch to Firefox. I attempted to use the version downloaded from the internet, which I already had installed for a long time, but it would not open. I then used the version available on the Microsoft Store, which worked fine. Eventually, Firefox crashed and would not reopen. A message saying something along the lines of "Are you sure you want to start Firefox in safe mode?" would appear for a split second, and then close. I tried:

-Starting Firefox in safe mode, but nothing happened. -Restarting my computer. -Reinstalling Firefox. -Running as administrator. -Checking it is not blocked by antivirus. -Using the profile manager to create a new profile: The .zip file version opens but does not help, and the version opened by using the "firefox.exe -P" command in Run suffers from the same problem as the browser and opens for only a split second. -Attempting to boot my computer in safe mode with networking, however, the Microsoft Store listed Firefox as uninstalled, and the network menu would not display any networks so I could not reinstall it. -Searching for any Comodo iseguard.dll files, but I found none.

The only thing that worked was searching "Mozilla" in files and deleting everything except what my computer said was part of the system. After that, I was able to open Firefox, but after a short amount of time, the problem started all over. I have no clue what to do and looking all over for solutions is driving me nuts! Please help!

YouTube videos not working with Firefox since recent updates. Videos start to load but don't don't complete. Firefox is the only browser with this issue. Have tried three other browsers without issue.

I wondered several times why firefox recovers old tabs when it chrashed. now i see that in my profile folder/sessionstore-backups the file recovery.jsonlz4 is some days old (while i was using firefox in the meantime very often) and does not update frequently as requested by about:config browser.sessionstore.interval = 15000 (15s). - this folder or the files are not locked. i can delete/rename them, they are not re-created - there is no file sessionstore.* in the main folder of firefox profile while running firefox - i am using 102.4.0esr (32-Bit) on a company PC (could there be any restrictions?) - the file previous.jsonlz4 seems to be created correctly when firefox is closed normal (which is not my usecase, i want to restore up to date tabs after crashes) - i am not using a private window

do you have any idea?

Every day. Videos won't play. sometimes one restart of firefox will fix it. sometimes multiple restarts are required before it'll work. The loading bar at the bottom of the video (on the seek bar) indicates the video is loading but it won't play. There have been times where I have disabled every single add-on and it would not work. Add-ons do not seem to be the cause. I have tried it in a private browser window with no joy. I have refreshed firefox, I have uninstalled and reinstalled it. I have tried disabling my antivirus. I have tested videos on websites in other browsers with no issue. The issue seems to be with the video player itself. overlays seem unaffected, I can use the seek bar and it shows the captions. I have tested different websites including Youtube, Vimeo and Steam. I tried many tens of times to get it working today to no avail. finally when I closed nearly all my tabs, the video worked (but I had also opened TOR and run avideo in that), I am not sure if this is the cause. If the cause is having multiple tabs open, this is an issue for me. I have a learning disability and likely ADHD and I have a set of tabs as my homepages so I don't forget things. If It's not the mutliple tabs, then what else can I do?

How to reproduce the bug: Jump to the address bar, and then press shift, ctrol, alt or windows_start, you can see the address getting deleted. You can also see it in Google Sheets and Microsoft Excel Online, it just deletes the cell, or a selection of multiple cells. --Interestingly on Google Docs it doesn't delete but just move the cursor to the first character when a string is selected.

 It happens only once per mouse click, or focus change

What I expect: Shift, Control or any mod key should not delete content or move a cursor

Thanks!