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On YouTube the video will start playing but the rectangle it should be in will still be black, refreshing usually works. Sometimes a video will simply stop playing. Sometimes i have to close all apps and restart the browser twice to get it to work. Sometimes trying to go to full screen will crash the app. Sometimes popping the app out of full screen into a floating window crashes it. This one is new, it's the uploaded screenshot, it crashed mid video and made the video look funny.

Firefox Update 124.2.0 (Build #2016012559), 7a0e399c7b+ GV: 124.0.2-20240401114208 AS: 124.0

Fire HD 10 (11 generation) Build 0029294005124 FireOS 7.3.2.9

Logged into Mozilla, Sync now does nothing, "Last synced: never" Also crashes frequently all since last update.

I have read the thread for this similar problems, tried all the suggestions but I'm Still experiencing videos not staying full-screen. Is there any other solution to it? This has started since yesterday but everything was fine before then.

"Hi there! I've been experiencing some difficulties with the Mozilla Firefox mobile browser on my Android device. Whenever I try to open certain websites, the browser crashes unexpectedly. I've tried clearing the cache and reinstalling the app, but the issue persists. Could you please provide some guidance on how to troubleshoot this issue or any possible fixes? Thanks in advance for your help!"

Sometimes when I click full-screen on a video, the app view disappears, and I am back out on the home screen. I still hear the video, and can switch back to Firefox and try full-screen again. It usually (maybe always) works the second time.

When it happens, I can briefly see the video go full-screen and rotate to landscape. When the view has disappeared the screen rotates back to portrait. Whenever a video stays in portrait mode when going full-screen, the problem does not occur.

Even when closing firefox, I can still hear the video. So I think it is related to this issue: [https://support.mozilla.org/en-US/que.../1420245]

What I have tried:

• Switching versions of firefox, they all have the same issue; Firefox, Firefox Nightly, and Fennec.

• Clearing cache and disabling add-ons has not worked, but seemed to make it happen less frequently for a while (not sure).

• I tried activating automatic screen rotation, but this made the problem worse. It would then not work the second time and firefox would only display part of the website in the top right corner of the screen. Closing it and re-opening it multiple times did not work. I had to turn auto-rotate back off.

• I'm using the KISS launcher. Tried switching to various other launchers, but it made no difference.

OS: Calyx OS 4.12 HW: FairPhone 4 Firefox: Fennec v116, Firefox Nightly Add-ons: uBlock Origin, Tampermonkey

Steps to reproduce : - go to YouTube - open a video - press the full screen button or tilt the phone sideways to trigger full screen - Firefox crashes and forces back to home screen - if opening Firefox again only half of the video component shows as in portrait mode, rest is black screen - if attempting to go side/full screen does properly show the video, but going back again to normal screen still shows the half black screen

I can reproduce this with a almost 100% rate, it only fixes itself by restarting Firefox, where it will work until phone is put to sleep mode.

I tried reinstalling Firefox from scratch, as well as deleting my browser cache and it didn't fix.

Dear Mozilla support,

For a while I have the problem that when I want to watch a video fullscreen on a website e.g. youtube, inline video etc. Firefox stops and completely closes. This is only the first time when I play the video. When I re-open the browser I can continue watching the video fullscreen without any problem. I don't receive any error messages.

Attached the specs of my phone and Firefox browser.

Kind regards, Rick

About a week ago my phone (Sony Xperia ZX2 Premium running Android 10) started 'crashing to the lock screen' whenever a download finished in the mobile version of Firefox. If multiple files are downloaded in short succession a popup will appear informing me that the 'System UI keeps stopping', with a prompt to close the app or to get to the app info (see the attached photo - clicking either option sends me back to the lockscreen, with the only difference being that after unlocking the phone the former will have stayed with Firefox in focus, and the latter having opened the Settings app on the System UI entry).

Going to about:crashes shows no recent crashes on Firefox's ends. (Plus, Firefox shows no signs of having been closed [like tabs being reloaded] after unlocking the phone again post-crash). The issue currently only happens when downloading a file through Firefox; downloading a file through Edge, Discord, or the Google Drive app produces no problems.

I have already tried force-stopping and restarting Firefox, restarting the phone, and clearing the download history with no luck. Furthermore, I have also checked for updates for the system, the Google Play Store, and Firefox for Android, however all of them were already up to date.

Any help would be sincerely appreciated.

Firefox on iOS crashed when I toggles the inactive tabs button on and off and I had about 48 tabs as well 300 + private tabs open for years and when I clicked on the restore tabs button, it did not work and nothing came back. Can you please help me restore the session? I really need those private tabs back so I can save them accordingly. The history is there for the normal tabs but the private ones are the ones I really need back. I just need to be able to restore that session. I can provide log files as needed. I would really appreciate it. Thank you.

Hello,

I am getting a frequent freeze in the Android app and then shortly after a crash. Info: - happens on FF, FF Beta, and FF Nightly,and reinstall/phone reset didn't fix. - Samsung Galaxy SM-G965U running Android 10. - every error starts with java.lang.OutofMemoryError. - it never happens just on startup, just on auto fill, or some of the similar crash reports I've seen around here. - it does appear to be site-specific, but sometimes the site works and sometimes it does not: if I close the last tab after a crash, it will usually work for awhile. - Sync and disabling Add-ons doesnt fix it, although perhaps its worse with uBlock Origin enabled (not conclusively)

Thanks for any suggestions.

edited for clarity

1. Whenever you login a site, Firefox does not remember the cookies from the login. So when you close the app and open it later, so you need to login again.

1. Firefox crashes a lot since iOS 16 and now too on 16.1, and now also since the release iPadOS 16.1. This makes the app difficult to use and really bad.

Both are very frustrating and important issue, please fix it!

Hello,

I've told to report technical issues on this website.

I've noticed an issue with Firefox iOS where, if Firefox silently crashes and I open a new tab by doing a long press on the iOS home screen, then selecting New Tab, Firefox only opens that new tab and does not restore the previous session and all previously loaded tabs are gone.

That has happened to me multiple times now and I've had to then try and figure out which tabs I had open by going through the browser history, which is pretty annoying.

To prevent that, I'm pretty much not using the long press > new tab functionality at all anymore and instead I open the app first, then open a new tab. Sometimes, I'll open the app, and if the app crashes, THEN I'm asked if I want to restore the session. Then I have to make sure to not accidentally press NO cause it seems there's no way to get that session back afterwards.

I would suggest a few ideas to prevent this issue: - please offer a setting to auto-restore previous sessions after a crash, instead of asking - alternatively, if pressing NO, or opening a new tab from the homescreen with a long press, offer a way to restore a previous session somewhere on the new tab page

When attempting to enter full screen mode on Firefox for Android, and to get into landscape mode, the browser appears to crash, keeps audio playing, and "entering full screen mode" dialogue pops up. Have to open Firefox again, and can only be viewed in landscape mode while session is continued. To return to non-landscape mode, the app needs to be force stopped, otherwise you only get to see the left one third side of any web page you navigate to. Seems to have started with most recent update. Is there any way to fix?

firefox for iOS 113.2 iOS 16.5 iPhone 8+

okay, so: this has only been an issue since i updated to iOS 16.5. i can open firefox for iOS without issue, and i think if i just tapped into the search bar that might be fine? (unclear.) but what i know is that as soon as i try to type in the search bar, the app crashes! how can i fix this?

Just updated to latest version of Firefox for Android (ver 113). When I try to watch a YouTube video in full screen, the app suddenly closes, as if I pressed the home button (note: I say "close" rather than "crash" because when I reopen it, all the pages are still loaded). This doesn't happen every time, but it is annoying. Is there any way to fix this?

Every time I open the current Firefox app it immediately opens and crashes. This starting happening a few days ago randomly but now happens all the time. I’ve deleted the app and reinstalled it but it didn’t help. Also restarted the iPhone 13 too. Suggestions? Thanks.

I have an Iphone 11 Pro with iOS version 16.5.1, and I have been having some problems with the Firefox app. I have a number of tabs on my browser, with some of them being very old. I was trying to clear some of them up and I noticed that a good portion of them will not load. Even though I can see their titles in the tab, when I select them, only a blank white page loads up, not even with a URL bar, so I am unable to reload the site. When I try to tap on the tab for longer than a few seconds to bring up additional options, the whole app crashes.

What can be done about this?