Firefox Community Forum

Hi! I'm experiencing a strange issue with Firefox.

Every time I start Firefox, the site addons.mozilla.org opens automatically — and it opens in fullscreen mode (as if I pressed F11). Here's what I've tried so far:

I disabled all extensions, but the problem still persists.

I changed the homepage settings to a blank page and even other websites, but it doesn't help — addons.mozilla.org still opens.

The issue happens even after restarting the computer.

I haven't reinstalled Firefox yet — I’d like to understand what might be causing this first.

Any help or suggestions would be appreciated!

Firefox freezes when I try to sign into YouTube via Google. Becomes totally unresponsive and I have to close browser. It's the only site this happens on. I have cleared the cache and cookies, unchecked "Hardware Acceleration" and other recommendations from other posts. Please talk to me like I'm your Baby Boomer dad.

Please let me know how to get my favorite sites back on my home screen. I use them a lot as they are real time savers. When I signed on this morning, it asked if I wanted Firefox to access my computer. I've always said yes and the updates have never caused a problem - until today.

I would appreciate an email ([edited email from community support forum]) letting me know how to get this to work.

I deleted all the shortcuts from Firefox desktop browser's homepage and now I cannot add them back.

There are no blank shortcut icons on the page anymore. No setting to enable them. Shortcuts are enabled. Page is mostly blank, only has Firefox icon.

I tried to close and open Firefox as well as disabling and enabling the shortcut setting. Adding more rows did not do anything.

Before this issue occurred, I had one shortcut on the page that was linking to localhost. I opened the edit window to the shortcut and pasted the same address and saved changes. After that I removed the shortcut. All of the blank tiles immediately got removed from page and I had no way of adding more shortcuts.

The favicons on my homepage are not appearing when I launch Firefox, and I can't find any way to restore them. Turning the favicons on/off in the settings doesn't help, it just moves the location of the search bar. I've included some images to better illustrate the problem.

Is there any way we can restore the favicons?

I opened Firefox this morning and all of my pinned shortcuts have disappeared. Shortcuts are enabled in the settings. I checked the browser.newtabpage.pinned pref on the about:config and all of my pinned shortcuts are still there, but they're not appearing on the actual page itself. Are there any other settings that I'm not aware of?

Hello, I'm using Firefox on Linux Mint. All of my homepage shortcuts have disappeared without the option to add them back. I tried toggling the shortcuts option on and off and nothing happens. Nothing also happens when checking and unchecking the sponsored shortcuts setting.

My problem is that Firefox will no longer allow me to login to my primary websites (email, bank, Costco, Apple...). I originally assumed that my outdated version of the MacOS was the problem, which was tied to the age of my outdated iMac hardware. Hence, I bought a new iMac, with the latest MacOS. Firefox still does not work. There is something wrong with Firefox and I don't know what it is. I have captured screenshots of the symptoms of what goes wrong with each website, but the one thing in common is that they are saying it is an application error on my end of the connection — which must be the browser (Firefox). I am being forced to do my daily business with Safari, but that is a strange browser for me, and they do not have my numerous Bookmarks. Also, their way of storing bookmarks is very strange, so I only have 5 — the ones that I have found so far that do not work with Firefox. There are probably more, maybe All of my bookmarks, but these are the 5 that I need every day.

Figure 1. Outlook (my email) When I log into my email, the result is Figure 1. This appears to me an application error on my side of the connection -- i.e., Firefox.

Figure 2. Costco.com When I log into Costco.com, the result is Figure 2. This appears to me an application error on my side of the connection -- i.e., Firefox.

Figure 3. Apple.com When I log into Apple.com, the result is Figure 3. This is Apple telling me there is something wrong on my side of the connection -- i.e., Firefox.

Figure 4. BankofAmerica.com When I log into my account at Bank of America, everything looks fine at first. But when I try to open my checking account, the result is Figure 4. This symbol, swirling forever, indicates something wrong on my side of the connection -- i.e., Firefox.

Figure 5. Hallmark.com When I log into Hallmark.com, everything looks fine at first. But none of the links will open, hence I cannot obtain any information about upcoming TV programs. This indicates something wrong on my side of the connection -- i.e., Firefox.

All the above examples work perfectly with Safari. Firefox is supposed to be the most up-to-date browser, so why has Firefox stopped working properly?

I'm using the latest Firefox. All of a sudden as of this morning, Firefox cannot not load Facebook or Twitter. I can open YouTube and YouTube videos appear but will not play (just a spinning wheel when I try to play). The Amazon landing page is scrambled with code. (see image attached)

I use Ghostery ad blocker but the issue persists when Ghostery is paused. I can use Safari without issue. Can anyone offer any insights?

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

Good morning,

Firefox is not loading webpages correctly this morning. From Gmail not displaying or opening individual emails, Amazon not opening, to Youtube and several other sites not loading or displaying correctly. I had no issues at 9 PM PDT yesterday.

No changes to the computer, and everything is up to date.

I have successfully opened the above mentioned sites and others on MS Edge this morning.

Thanks!

My shortcuts no longer appear on my homepage. This just started happening. Shortcuts are still enabled in my settings. I refreshed Firefox. The shortcuts reappeared for a while, then disappeared again when I closed/reopened Firefox. I am on Windows 11 O/S

I have various shortcuts saved on the shortcut page comes up after logging in. Its set to 2 rows.. I use it every day. Used it this morning and working perfectly. Been out and when I came back the page is totally blank. I've tried sytem restore to 5th October but makes no difference. I use Windows 10 and read that Firefox are continuing to support Windows 10 I'm visually impaired and use a desktop PC with a large screen. I'm not PC techically knowledgeable. How do I restore my shortcuts or how do I re create them?

Hi everyone,

After enabling `privacy.resistFingerprinting = true` in `about:config`, I noticed that Firefox’s built-in PDF viewer (`pdf.js`) is always displayed in **light mode**, even though my system and browser themes are both dark.

I understand that RFP forces `prefers-color-scheme: light` to prevent fingerprinting, but this also affects internal components like the PDF reader. Unfortunately, the PDF viewer doesn’t provide a manual dark mode toggle.

Is there any **official or safe workaround** that allows keeping RFP enabled while still having the PDF viewer use dark colors?

Thanks!

So Im currently trying to watch young sheldon on netflix, and im doing it through firefox, and it wont work, it says error code f7701-1003, thank you for your time.

When using YouTube system freezes between 5-30 mins, of start of any video. I have troubleshooted, i have checked every extension, i have run every diagnostics on hardware and software , checked and updated every driver but no results i tried checking online but didn't file any solution , the only thing i can do is to reset my system, it does not happen in any other situation. This is happening since the start of Oct'25, if anyone has any idea how to solve this kindly help.