Firefox Community Forum

Since latest upgrade (1/16/2026) I cannot log in to Outlook email. This is specific to Firefox 147.0.1 (Chrome and Pop Peeper logins to Outlook work fine). I tried clearing cache, updating, restarting, rebooting, trouble-shooting mode, private window etc. to no avail. I get 400 error from Outlook.

I've asked about this before but got no help Firefox is my browser of choice. Occasionally, I find in necessary to use Chrome.

The vast majority of time, when are both are active at the same time, one or both crash, like today. Firefox closed abruptly, then the crash report appeared. I have the crash report. Chrome froze up, and had to be shut down in Task Manager.

It only occurs in this scenario. Rarely does Firefox crash otherwise.

Can someone please advise where to go to get help?

How come FF translates sites in tiny, irrelevant languages like Bulgarian, but not from major languages like Chinese and Arabic?!?

I wish I could dump Edge, but this FF deficit forces me to keep Edge on my computer...

I'm having issues using Firefox with the Facebook site. Groups are slow to load and sometimes the chat and notification windows take forever to load with shimmering panels or a wait cursor displayed. I've cleared the cache and deleted the cookie, but that didn't rectify the issue. I don't have a problem with Edge.

For a while now, I've been having recurring issues with Firefox desktop freezing and becoming totally unresponsive. If there's any pattern to what causes it, I haven't been able to notice it; sometimes it happens as soon as I open the browser, sometimes it happens after several hours, sometimes it happens twice in ten minutes, sometimes it happens twice in a few hours (however, I can count the number of days it's happened less than twice in one day in the past few weeks on the fingers of one hand). When the browser freezes, it becomes totally unresponsive - it doesn't fade or display "Not Responding", and Task Manager shows nothing abnormal, but it doesn't accept any input at all, any video or other animated material that may have been displaying freezes, and it can only be "fixed" by force quitting from the task manager and reopening. This is exclusively a firefox issue; other programs open at the same time as the browser freezes are not affected.

The only real lead I have as to what could be going on is that sometimes, things don't freeze all at once, but in a cascading effect. For example, tabs, bookmarks, etc. might not highlight when moused over, but still accept the clicks, or selecting another tab might causes the address bar to display the URL of the selected tab, but the screen displayed in the window will not change. Once these cascading changes start, they generally progress to total freeze before I have a chance to do much with that information (only a few seconds), but it's unusual enough behavior to be worth noticing.

Things I've already tried that haven't fixed the issue:

• Reducing the number of tabs used and otherwise reducing Firefox's system resource usage has not impacted the problem in any way.
• Running in Troubleshoot Mode has not had a consistent effect on the problem (the most recent time I did, the browser ran stably for longer than I could stand to use the internet without my ad blocker, but this is only one data point in an already inconsistent spread; prior instances of the problem have occurred in Troubleshoot Mode)
• Disabling hardware acceleration has not fixed the issue.
• The issue has persisted through multiple refreshes and at least one full uninstall and clean reinstall.
• The issue persisted after creating and switching to a new profile multiple times.
• The issue persisted after renaming places.sqlite
• The issue persisted after clearing cache and cookies multiple times.
• The issue persisted after clearing downloads and history.
• And very likely some other stuff that I'm forgetting, I've been trying to fix this on my own for a while now.

I usually download and install manually the custom install of Firefox on Windows.

Recently, a new version was automatically installed without my permission and destroyed all my customization. THIS IS UNACCEPTABLE. I had to restore the older version from backup and I was going to stop updating.

But I see that the manual custom installation is still available for download.

I want to make sure that if I use it it will not wipe out my customization again.

Please confirm.

I have a site where I have a valid login and password. I can login in Edge and FF Private Window, but in FF I get the attached message. Coninued tries gets me locked out for 24 hours.

I have whitelisted the site. Cleared caches and cookies, etc.

What does this mean and how can I fix it?

Thanks!

The fucking forced dark mode has return despite the previous fix layout.css.prefers-color-scheme.content-override = 1 in about:config fixing it for years. This and the current replacement fixes don't save. I want a solution for PERMANENT light mode (black text on white background) for ALL menus, pop-ups, dropdown menus and hover over tab info.

And don't tell me to go search for a different theme I've already spent hours doing that and firefox has broken them only making some menus use the appropriate mode. On top of that I can't even pick an option to search for one that uses light mode I just have to go through each one and try it if I want to know which mode it uses that is NOT a solution to anything.

Replacement "fixes" for reference: ui.systemUsesDarkTheme won't even let me set to 0 only has true/false browser.theme.content-theme set to 1 browser.theme.toolbar-theme set to 1 (Why in the absolute hell these were added when a simple addition to preference setting wasn't is beyond me)

Very sorry for the aggressiveness but I am so very VERY tired of having to fight firefox on this preferance for years when their dark mode hurts my eyes.

If an URL already have many tags or longish tags I can no longer see suggested tags when starting to type tags. Image example illustrates. This URL already have the following tag list:

1942, Air_Ministry, boost, cruise, memorandum, MP, rpm, Spitfire, Spitfire_MkIX, Spitfire_MkV, Spitfire_MkVI

Old behavior was if started to type ", spi" it would list suggestions:

Spitfire Spitfire_MkIX Spitfire_MkV Spitfire_MkVI

Easy & clear to select from.

Now it lists all already existing tags before each suggestion:

1942, Air_Ministry, boost, cruise, memorandum, MP, rpm, Spitfire, Spitfire_MkIX, Spitfire_MkV, Spitfire_MkVI,Spitfire 1942, Air_Ministry, boost, cruise, memorandum, MP, rpm, Spitfire, Spitfire_MkIX, Spitfire_MkV, Spitfire_MkVI, Spitfire_MkIX 1942, Air_Ministry, boost, cruise, memorandum, MP, rpm, Spitfire, Spitfire_MkIX, Spitfire_MkV, Spitfire_MkVI,Spitfire_MkV 1942, Air_Ministry, boost, cruise, memorandum, MP, rpm, Spitfire, Spitfire_MkIX, Spitfire_MkV, Spitfire_MkVI, Spitfire_MkVI

Suggestions are scrolled right invisible outside the input box.

Who thought this was a good new feature? It adds nothing, I can already see existing tags, why would I want to see them repeated for each new suggested tag (while not actually seeing the suggested new tag)?

How can I turn this *!$&@! off and return to old behavior?

i keep getting Firefox crashes and i also get Firefox already running close firefox i have the latest version i do not understand why please help thanks

Hello I have Firefox 144.0 (64-bit) installed. I added Video DownloadHelper to Firefox, but its icon doesn't appear in the Firefox toolbar. I've tried using Toolbar Customization, but the Video DownloadHelper icon doesn't appear there either, so I can't drag it to the toolbar. Can you help me put the Video DownloadHelper icon on the Firefox toolbar? Thank you

Sometimes when I sign in on Microsoft Outlook's email portal - a multistep process requiring authentication on one's phone - it says: "Hang on a minute while we sign you out" and then boots me, forcing me to sign in again. For awhile this was happening only occasionally, and the workaround was to delete all cookies for Microsoft online and Office. But now this is happening more frequently, and sometimes it happens immediately after deleting the cookies. In effect, Outlook on Firefox creates cookies that then prevent it from working. And it doesn't matter whether you say yes or no to "Stay signed in?" at the end of the sign-in process.

I reached out to Microsoft tech support, and they basically said this is a Firefox issue because it doesn't happen on Chrome or Edge.

Anyone else encounter this?

Hello, Firefox won't save my download history between sessions, history is set to remember. I tried doing the refresh on the installer and even reinstalling firefox and deleting all mozilla folders in %localappdata% and %appdata% before reinstalling. it just forgets all downloads once I close firefox.

Video Link

i go to chrome have no problem getting and keeping Facebook i have closed and enable the extensions removed some and it either does not work or takes for ever in the version of Facebook. . I keep checking if Facebook is down there are limited problems but i do not see the problems in Chrome. if this keeps up i will be going to chrome which i really do not want to

If I don't use the custom adjustments in my Chrome css, seven buttons on that right side of the menubar are hidden, including the min-max close buttons.

This is problematic when I'm troubleshooting Firefox, and the css is disabled. If I want to close or take the browser out of max mode, I must move those buttons to the navbar, which has no such restriction accommodating those buttons, not to mention why is it necessary for that min-max close trio to monopolize 20% of the menubar. Waste of space. Inefficient.

I'm also curious why must that frame at the top of this sites pages remains persistent, and follows the user down the page, so that when you're composing, and accidentally (and all to often) touch one of those links, it get superimposed over the message, and you must move the cursor to the bottom of the page get rid of it. Not to mention, that frame shrinks the working area of the page about 30% vertically.

I mean, once you have already navigated to the destination page, and you're composing, how often/likely are you going to need to access that area?

As noted by others about recently-prior versions of Firefox, version 129 ALSO fails to play videos (on Amazon Prime) at HD even though other browsers, Chrome and Edge as examples, work perfectly well. This problem MAY have started with a fairly recent version of Firefox (like 127 or 128). See the post right here by another user, earlier Firefox version, with the EXACT same problem:

https://support.mozilla.org/en-US/que.../1455729

I can login into Xfinity email, but not into the billing section. I've attached three printscreen errors. The 1st is a handshake error as seen in top address bar. The second is a Access Denied error and the third is a "waiting for bat.bing.com"(a tracking cookie)error that can be seen in bottom, left hand corner.

I reached out to Xfinity tech support and was told to try a different browser. I tried DuckDuckGo and that did work and let me login and pay my bill. I told the tech that I would still rather keep on using Firefox. He said "that's something that you would need to take up with Firefox since we now know the issue is with their browser"

How do I get this issue resolved so that I can keep using Firefox as I have for many years now?

Note: Already tried clearing cookies and browsing history with no difference.