Firefox Community Forum

Moments ago I rebooted my computer after a long day of heavy use (it's old). After rebooting and opening my Firebox Browser, I noticed all my Bookmarks were gone. I created a Firefox Bookmarks Export file on another desktop computer using a thumb drive and plugged it into my current desktop computer, and imported the Bookmarks. Great. They all seem to be there again. But the entire appearance of all the websites I regularly use have changed. I use Google Calendar and all the colors are gone. On my other computer, all the different tasks I've created still retain their colors with white lettering, but on this latest version of Ubuntu machine after the reboot, all by tasks are plain white with Black lettering. I compared the settings for Appearance on my two different computers and they are exactly the same. I couldn't Login to X on this machine after doing so numerous times, and after I logged into Bluesky, the appearance was completely different. I don't know what happened. The two attached screen grabs show the difference between this computer and my other one which still shows the color combinations that I want back within Google Calendar. Any idea what went wrong? Also, I tried to click the checkbox below that says, "Email me when someone answers the thread," and I could not. It wouldn't accept the check mark.

When I expand the Firefox page to fill my screen the top section of the application is completely blocked (see picture) I can only see about .125 or less in of the bookmark section. Everything else is blocked. No other application is having this problem, only Firefox. Until this evening Firefox has worked just fine.

When the application is not set to fill the screen I can see everything fine. (see picture).

I have uninstalled program and reinstalled... no luck. I've cleared out all history, cookies, etc... no luck.

Please advise.

Barbara Burger

I've done all the troubleshooting I could find, including: Uninstalling, tried using beta ff, disabled hardware acceleration, disabled/removed all extensions, memtest, updated various drivers. Still frequent tab crashes Tried two other browsers and neither of those had any issues. No crashing on edge or duckduck.

Crash reason seem to be mostly EXCEPTION_ACCESS_VIOLATION_READ and EXCEPTION_BREAKPOINT

Few crashes from today: https://crash-stats.mozilla.org/repor.../647f9599-8e18-417d-852e-b52300250827 https://crash-stats.mozilla.org/repor.../2001d7f1-4cfc-476b-9a88-4679a0250827 https://crash-stats.mozilla.org/repor.../b2101bae-a1cc-404c-b0d2-7b8230250827 https://crash-stats.mozilla.org/repor.../dede8925-55e3-484e-b2ab-3863d0250827

I've come across a bunch of issues with opening a new window in Firefox. Can anyone here help me fix this functionality please? I'm running Windows 10, with a freshly installed copy of Firefox .

-The bookmark bar on a second window is blank. Disabling it (ctrl + shift + b) and re-enabling it, doesn't fix it, but you can see the "space" for the bar going away when disabled. I can't drag items from the main window's bookmark bar to this blank bar either.

-Reopen closed tab button doesn't seem to work at all on a new window. It works as intended on the first window.

-Tabs always show "Exit full screen mode" even when not in full screen mode. Clicking this option, enables full screen mode. Clicking it a second time, disables it and brings us back where we started.

-Cannot access the application menu (hamburger menu) on a new window. Clicking the button does nothing. Also applies to any extension button that appears in the top right corner.

This is about Hotmail.com/Outlook.com, the web email version.

My hotmail.com email is set up so I don't have to sign in on my laptop. Of course, if I delete my history, then I do have to sign in, but I always check the box so I can skip the sign in page.

The other day, I did a Windows Update (Windows 11). That's all. I did not delete my history or anything. But I had to sign into Hotmail. And yes, I am clicking "Yes" to skip the sign in page.

Turns out, I don't have to sign in when I use the same Firefox browser that I signed in on. But if I x out of my browser, and open up a new browser, I have to sign in. It was never like that. I was always able to skip the sign in page.

I thought this was a Microsoft Issue, but I am skipping the sign in page using Chrome. So it's a Firefox issue.

So what is going on? And how do I skip the sign in page even after I open a new browser?

I have windows 10. Last 3 or 4 months I have been getting notices from firefox for updates. Dismiss or install. When I install the update and at the some point log off the internet. The next time I log onto the internet the computer takes 5-10 minutes to load my home page. I assume this is because it is installing the update? Any way to speed this up? I'm thinking of disabling updates because of this problem. Thanks. Brian

Enabling HDR (gfx.wayland.hdr) on Linux CachyOS causes random lines to appear on the screen, both vertically and horizontally seemingly at random. Perhaps important to note that the OS originally didn't recognize my laptop display's HDR capability so I had to "force" it on with KWIN_FORCE_ASSUME_HDR_SUPPORT=1, but it still can't actually read the display's specs from EDID. Disabling gfx.wayland.hdr fixes the issue but I do really like HDR so I think I'm willing to live with it for now.

I was able to get on my work site just fine yesterday and this morning, but after Firefox said it needed to be updated and I did it, I can no longer get on my work site (neither the front end nor the back end). My work site is www.lawtoninfo.com. I cleared the cache and cookies and did some configuring, and it is still not working.

After reinstalling the browser, the folder "Old Firefox Data" appeared, which requires administrator permission. It does not allow you to grant yourself permission and change the owner. How can I delete it? Has anyone encountered the same problem? Please help

All of a sudden while using Firefox I am not able to access my history. I can normally click on the three horizontal bars at the top right, but that isn't working anymore.

A lot of my tabs are no longer working since Firefox updated this morning. Here is an error message while trying to long into my Outlook email account, which I'm able to log into on Google -

Request Id: 900f1717-05b9-4f79-8a24-ff0686c96300 Correlation Id: 97f5a174-b630-4245-90d3-cce9fae91938 Timestamp: 2025-08-27T16:51:00Z Message: AADSTS900561: The endpoint only accepts POST requests. Received a GET request.

Anyone else see this? When I click the mouse wheel to enable autoscrolling, before I get halfway down the page Firefox starts eating up processor time. You can hear the fan start spinning up until it is screaming at 90%

Mozilla Firefox for Linux Mint Mint-001 - 1.0 142.0 (64-bit)

Siriusxm won't display fully on my Firefox, the selection buttons don't show. It works fine on Chrome - Sirius says it's about Firefox. file:///C:/Users/Owner/Downloads/Screenshot%202025-08-27%20at%2013-38-08%20SiriusXM%20Streaming%20Music%20Sports%20News%20Podcasts%20&%20Talk.png