Firefox Community Forum

Firefox on Windows 10 desk top suddenly stopped working with error message

XUL Runner Error. platform version 127.0.1 not compatible with Min version >= 127.0 Max version <=127.0

N.B. This is another machine - not this lap top

Please advise

My issues:

1) Every time I close Firefox I get the Mozilla Crash Reporter telling me that Firefox has crashed. Sometimes I even get the Mozilla Crash Reporter when I start Firefox. But Firefox is still there.

2) When I turnoff my Comodo Firewall, Firefox has no Internet connection.

I have done clean uninstalls/reinstalls over and over. I go thru and adjust settings. My other browsers work fine, including WaterFox, WaterFox Classic, and Vivaldi.

I tried turning off my security software to test. Specifically exiting Comodo Firewall seems to have caused Firefox to not have an Internet connection. All other browsers have Internet access except Firefox. And the Crash Reporter cannot "report" when the Firefox Internet connection does not work, though I did have it report many times when the connection DID work.

One other clue: In Task Manager I see that even though I have closed Firefox, there over 20 instances of it still running. When I try to open it again, I get the "Firefox already running" error message. When I try to kill these instances/processes many will not close.

This problem has been persistent for more than half a year since I built my new PC. I am on Windows 10 LTSC. Besides Comodo Firewall, Emsisoft Anti-Malware is my main anti-malware.

Please help! Thank you!

Every time I open Firefox after closing it, I get the message below. I can click the button to restore session and it works every time. With each update, I hope to never see this message again, but after installing a new version on Ubuntu today, I see the same familiar message. This is not linked to a computer, or an operating system because I've seen this on both Ubuntu and Mac. If Firefox could literally just click the button that would be awesome.

Sorry. We’re having trouble getting your pages back.

We are having trouble restoring your last browsing session. Select Restore Session to try again.

I am using Firefox 127 on Ubuntu.

When I press the Control key, I often lose focus in the window I am currently viewing. This is annoying as it prevents me from copy-pasting for example.

Sometimes the focus is back when I release Control, sometimes it is lost and I have to click again on the text field. It does not happen on all websites, for example support.mozilla.org works well, but it happens on duckduckgo or overleaf.

It does not seem to be the same as existing issues such as [the "show mouse when press Ctrl" of Ubuntu] (it is disabled) or an addon (the problem still happens in safe mode).

In case it is useful, when I press Control the tab bar background goes slightly darker, see attached images.

Thanks for your help :) Nicolas

For over a month now i have a problem with youtube. It loads videos very badly. I have good connection speed, but 0 network activity and 0 buffer health in Stats For Nerds on youtube and videos dont load. I can wait for 10-15 minutes (but sometimes they load almost instantly) before video load 40 sec buffer and after that buffer ends i can wait for another 10 minutes befor it load buffer again.

This problem persist only in my firefox on my computer. I tried deleting all the extensions, reinstalling firefox, "refresh firefox" future, changing useragent, reinstalling windows (it was the time anyways) but it doesnt solve the problem. I dont have this problem in other browsers (edge, librewolf, chrome) on my computer.

OS: win 11 x64 Firefox 127.0 x64

I installed Firefox years ago. This morning, when I click on the browser icon, I get this message: Error platform '127.0.2' is not compatible with minVersion>= 127.0.1 maxVersion<= 127.0.1

What is going on? The browser updates itself so I don't do anything. But now, it doesn't work. I use an alternate browser to send this message to you.

I am using Windows 11 and FF 127.02. I have read the lag issue with Youtube was suppose to be corrected with FF 127.02 but it is not. I have been using FF for many years now an love it. It is my understanding that it is the ad blockers causing the slow down. Do you have an estimated date when this will be resolved. I have tried every trick included running it in diagnostic mode or trouble shooting mode. Nothing seems to work. Not even a refresh.

Thanks

I've been having this reoccurring firefox bug every couple of months where randomly all audio from the application stops working is no longer available in the volume mixer of windows 11 (see example screenshot with twitch tab in background playing)

In the past, I was able to fix this issue by simply restarting the audisrv service and everything would work normally but now nothing I do seems to work. I've tried:

- Resetting - Uninstall/reinstall - Disabled all extensions - New profile

I do not have this issue on firefox dev or firefox nightly. If anyone has any ideas on how I could resolve or better diagnose this issue it would be much appreciated! TIA

I have a very good PC (5800X3D, 7900XT, 32GB DDR4 3600), but Firefox (either the normal, canary and nightly version) can't play smoothly any 4K video (like the Borderlands trailer: https://www.youtube.com/watch?v=lU_NKNZljoQ ). 1440 and lower resolutions are fine, as are 4K videos on Chrome and Edge. FWIW, my CPU during 4K playback is barely used (1-2%), and my GPU's video codec (VCE) is used by around a third. Disabling HW accel makes things better, as it still stutters but it's (barely) passable. I already tried creating a new profile, but still it's the same.

My pc auto updated today and now I am getting this message "ERROR: Platform version 127.0.02 is not compatible with min/max version 127.0.1" I CANNOT go back to older version as there is none, when using the tool from FireFox.

I woke up this morning to my home directory having been remounted as read-only (it has its own dedicated hard drive at /dev/sdd1). I ran e2fsck and things looked good, so I restarted and things were fine again.

However, whenever I open Firefox, it hangs for about 1 full minute before it goes haywire and renders the entire system essentially unusable since being able to access my home directory is vital. The following is visible in dmesg:

[ 2710.362946] Aborting journal on device sdd1-8. [ 2710.363000] EXT4-fs warning (device sdd1): ext4_end_bio:343: I/O error 5 writing to inode 10520593 starting block 44134769) [ 2710.363008] Buffer I/O error on device sdd1, logical block 44134513 [ 2710.363041] EXT4-fs error (device sdd1): ext4_journal_check_start:84: comm glean.dispatche: Detected aborted journal [ 2710.363048] EXT4-fs warning (device sdd1): ext4_dx_find_entry:1795: inode #9718667: lblock 2: comm Renderer: error -5 reading directory block [ 2710.363076] EXT4-fs warning (device sdd1): htree_dirblock_to_tree:1082: inode #9701223: lblock 1: comm Cache2 I/O: error -5 reading directory block [ 2710.800016] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm BgIOThr~ool #12: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.812447] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm Backgro~Pool #1: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.884557] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm Backgro~Pool #1: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.980923] EXT4-fs (sdd1): Remounting filesystem read-only [ 2711.049635] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D. [ 2711.152739] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D. [ 2711.152757] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D.

All other programs that I use daily do not cause this issue. No clue what to do here. LibreWolf works fine - that's what I'm using now that Firefox breaks everything and basically forces me to restart if I want to use my computer normally.

Firefox 115.12esr slow to startup takes up to 10 second to load the first time now Firefox was fine in version 112.esr. to bad Firefox forces updates, even when the update make Firefox worse. https://snipboard.io/QF0ERT.jpg of course it works faster without extensions, that does not mean anything. I would reinstall the older version but Mozilla fixed so we cannot. I do not have time to reinstall all the extension so I am left with a useless Firefox. To bad Firefox does not allow reinstall of extension automatically, a reset of Firefox would also make Firefox useless; I am at a loss to how to continue to support Mozilla and not switch to another browser?

Dear friends,

I have Firefox Browser 127.0 (64-bit) installed. IFRAME is not displayed on some websites.

Example: https://www.rollerfreunde-untermain.de/gaeste.htm

Attached you will find a screen shot.

Can anyone say why this is the case?

Kind regards Uwe

Dear Support Team,

After updating to last Mozilla Firefox version (126.0.1) all my ngx-datatable tables are overlapping all rows over the first one even if the entire height of the table is correct calculated.

This is a blocking point. I need assistance urgently.

Hi,

I can't watch live stream on youtube. I see only black screen on loading circkle. Ads working fine but after them i see what i said before. When live is over then i can normally watch it. I can watch twitch normally. There is problem olny on yt. best chris

Hello!

I get this error often when I try to access various websites. This doesn't happen when I use Opera, so I assume the problem is not with the websites.

My OS: Windows 10. My Firefox version: 127.0 (64-bit).

I like Firefox and am using it for years, but I cannot accept lengthy loading time. I have a fast and stable internet so this is not the problem. Please let me know what the problem is and how to fix it.

Dear friends,

Firefox on Linux does not allow entries in forms that are called up in IFRAME. It works perfectly on Android.

Does anyone know why this is the case? Uwe

Firefox 127.0 (64-Bit)

I am trying to access websites that use three.js. When I initially start, the website runs too slowly to be usable, but if I tab out for some time and then tab back in, the website runs at normal speed for a bit before slowing down again. I cannot find any solutions to this problem nor anyone else who had the same problem as me.

OS: Windows 11 Home 23H2 (22635.3720) Firefox Version: 126.0.1 GPU: GIGABYTE NVIDIA RTX 4060 Ti 8GB GPU Drivers: Game Ready 555.99