Firefox Community Forum

Hi,

Firefox version: 139.0.4 (64-bit) OS: Windows 11

I have been having issues where Firefox tab will just crash out for no reason it appears and it happens at random times and once the tab start to crash, and I restore it, it will crash again and again. The only way tog et out of the loop is to restart Firefox.

I have tried: Refreshing/Reset, Clearing Cache and History removing all themes, disabling extensions, disabling my anti virus. Turning off hardware acceleration didn't make any different.

I currently have 2 extensions enabled: uBlock Origin 1.64.0 and Bitwarden Password Manager 2025.5.0

In the about:Crashes I have reported them all and they seem to have the same type of reasons in the Raw data/Minidump which are: EXCEPTION_ACCESS_VIOLATION_WRITE EXCEPTION_ACCESS_VIOLATION_READ

Any help as to what to try next?

Gaz

Today randomly i noticed that my bookmark bar is waaay shorter out of the blue, i didn't change or adjust anything, all i do is the updates from mozilla that's all, it was all music it really saddens me because atm it's lost forever, i hope somebody can help me (i don't know since when it disappered i literally just noticed it right now ...)

YouTube videos encoded at 60 frames per second are extremely choppy in Firefox only. Microsoft Edge plays the same videos perfectly.

I have deleted my profile and reinstalled Firefox, updated graphics driver to the latest version, and toggled hardware acceleration on and off. Nothing helps.

I have the newest firebox version and i have you tube connected to the menu bar and 2 icons for it on the desktop i m not sure what if an addon are cause it to stay in full screen screen mode i do not wan it in full scene mode. i have done everything i know how to do to stop it from full screen please how do i get it ti default always just giving you a sample of what Iam getting just a sample of the size i do not have firefox zoomed it is on 100 percent and not zoomed the sixes is 16 and 14 an no larger.

Hello.

I use Firefox on an computer with Ubuntu, (installed as snap) and have noticed that since the update to version 140 (specifically, version 140.0 canonical-002-1.0), closing a tab causes a noticeable delay : that is, upon any action that would close a tab (clicking on the cross, pressing CTRL+w, or middle clicking), there is a delay of about 200 to 300 ms before the tab is actually closed.

However, during this delay, the window still responds to inputs, leading to rather annoying situations. For example, during regular usage, I usually open a great number of tabs. When I am done with browsing, I close them, by repeatedly clicking the cross button on the tabs. It used to be that the tab under the cursor would immediately close, then the next tab would slide under the cursor, and I would click again to close that one, etc.

But now, when clicking the cross button, the tab is not closed, and when I click again after a small delay (because of muscle memory), the tab is still there. This cause the two single clicks to be treated as a single double-click, which for some reason puts the window in full-screen mode (but only with the snap version; I'm not sure what's going on here).

When using CTRL+w when closing tabs, the delay is still there, but the inputs are correctly handled. If I press CTRL+w three times at the usual rate, I can see the three key presses, then nothing happens for a few instants, then the three tabs close at the same time (i.e. the delay is from input to tab close, not from tab close to other tab close).

This behaviour is completely absent on Firefox (also version 140) on my windows computer.

This delay does not appear when creating tabs, and it does not occur either when closing the window or when closing the last tab in the window (leading to an amusing situation where shutting down Firefox is actually faster then closing a tab). These operation keep going at their previous speed, immeasurably fast to the human eye.

Navigation does not appear to be meaningfully slower than before the update, and the CPU/memory usage is very reasonable.

Curiously, this appears to be a fixed delay. Closing an empty tab takes the same time as closing a very busy one. Closing a tab when there are five takes the same time as closing a tab when there are thirty.

This issue makes browsing feel incredibly sluggish.

Is there a solution for this problem ?

Edit 1 : I have tried to run Firefox in troubleshoot mode, but there was no difference in behaviour. Edit 2 : Fixed typo. Edit 3 : Added exact version. I also tried to refresh Firefox, but the issue remained. Edit 4 : The problem is still present in version 140.0.1 canonical-002-1.0. Edit 5 : The problem is still present in version 140.0.2 canonical-002-1.0.

Hi guys,

I connected my private crypto wallet to a fraudulent OKX scammer wallet extension, downloaded from your Firefox store couple of weeks ago. I deleted the wallet after I realized it's a scam but the scammers already drained my entire wallet afterwards, I lost approx. 14,000 USD.

I saw this warning too late: https://t.co/wSQv696SvM

Do you guys have any idea, where I can report this case or what I can do? I mean, I am quite sure that I am not the only one affected by this scam.

Thanks Marc

So I updated to Sequoia on my Mac and have run into a variety of problems, i.e. Instacart won't open at all, Amazon has slowed down significantly, can't access my health insurance site (stops at login) and now today Firefox has an update but nothing is actually happening. The wheel just spins and spins and now everything on my machine has slowed to a stop. So my question is how do I stop the update from happening right now?

hey, I update my laptop windows, after updates when it restarted I have signed in to my account but bookmarks wasn't recovered. It was totally gone. I want my bookmarks back it is really important to me.

Currently I only have 3 tab groups (private, tabs, sync) available in the iPhone version of Firefox. Are there plans to create tab groups like safari? If they already exist, how do I create a new group?

Hi everyone,

We’re testing scroll-linked animations on a landing page built with Tailwind and custom JS for our client project hosted at https://noveltyads.com. Specifically, we’re exploring the ViewTimeline API and CSS animation-timeline for a horizontal scroll section.

While everything works smoothly in Chromium-based browsers, we’ve noticed Firefox behaves inconsistently in the following ways:

The animation-timeline: view() property doesn’t always trigger on scroll as expected.

Debugging with Firefox DevTools, the animations don’t appear in the Animation panel at all.

We confirmed that no polyfills or fallbacks are interfering.

This is happening on a custom-built section on this live test page: https://noveltyads.com (it’s a mock client version for internal QA — nothing behind a paywall or login).

Has anyone experienced similar behavior with Firefox’s scroll-driven animations or ViewTimeline implementation?

We’d love to know:

Whether Firefox fully supports ViewTimeline (or still considers it experimental)

Any DevTools flags or settings needed to see scroll animations properly

If there's a better way to ensure cross-browser consistency using native APIs

Thanks a lot for your help and insights!

— Usama

Hello, Today i was working on a friend laptop, i was using the private browser while i was downloading a very sensitive files, after closing the private window i couldn’t find the files is that normal? Also, do you think that the files might be found, or they gone for life? Cuz i don’t wanna my friend to maybe find them one day.

Hi everyone, I use Firefox as the main browser for my iMac (Sequoia 15.4.1). Recently, Firefox has been incredibly slow. I'm able to boot up and open Firefox (140), but when I search for something or create a new window, it never loads. Is there a way to fix this? I can open the same websites on Safari, but Firefox is my employer's preferred browser. Additionally, my bookmarks are all saved on Firefox. Thanks for insights/ideas/solutions.

Hi community,

Since the last Firefox update, I’ve noticed that many websites load as a blank white page on the first attempt. The only way to get the content to appear is by refreshing the page manually (Ctrl+R).

This happens randomly on both static and dynamic websites — sometimes even on Firefox’s own support pages. I’ve already tried:

Clearing cache and cookies

Disabling all extensions

Running Firefox in Troubleshoot Mode

But the issue still occurs. No errors in the console either.

Is this a known issue with a recent update? Or could it be related to hardware acceleration, DNS, or caching settings?

Would appreciate any advice or similar experiences!

Firefox 140.0.2 on Windows 11 All localization settings are correct (English / US)

I like to use the Inter font where I can due to its legibility, etc. I've used it as the default font in Firefox for a long time and I have Firefox set to not override fonts. Recently I've noticed some glyphs aren't getting rendered / chosen correctly. This is just one example (a message entry field on a forum) but I've seen it elsewhere so it's not just this page. See the attached images comparing Segoe UI and Inter.

Font issue or Firefox? I'm tempted to suspect the latter since I've used Inter all over the place previously without problems and being a font, once done it's done. I've also not seen issues in places using Inter.

Thanks.

Description: while viewing videos on youtube, twitch, odysee (and possibly other sites with videos), the video player may suddenly stop playing, and after that, no video in firefox can be played. Restarting the browser makes this issue disappear for a while, but i'd like a permanent solution.

What i've tried so far: Disabling uBlock Clearing cache and cookies Enabling/Disabling hardware acceleration Disabling proxy extension Disabling antivirus on PC.

Hello, I'm having a problem with firefox crashing when I try to google something I tried safe mode, but that does not help, the crash is still there It started after I updated my firefox, current version is 140.0.2 Before that I had some older version but I dont remember which one

here is one of the reports: https://crash-stats.mozilla.org/report/index/749a4683-617c-4d91-b766-c530d0250630

Thank you in advance for the reply

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