I-Firefox Community Forum

Issue Description: I’m experiencing a problem with fullscreen mode while using YouTube on Firefox on Windows 11 with a dual-monitor setup. When I enter fullscreen, the video does not cover the entire screen. Instead, I can still see parts of the Windows desktop or background around the edges of the display.

This issue only happens on Firefox and only when using fullscreen mode on one of my monitors. I have already checked my display settings, scaling, alignment, and hardware acceleration, but the problem persists.

System Details:

Windows 11

Dual-monitor setup

Browser: Firefox (latest version)

Issue: Fullscreen video shows borders and does not fully cover the screen

Expected Behavior: The fullscreen video should completely fill the selected monitor without showing any part of the Windows desktop.

Please advise on how to resolve this issue.

Suddenly I can no longer connect to gmail or googlemail on mozilla. It works fine everywhere else. At present I'm having to use Microsoft Edge for emails. Everything else on Mozilla seems to work fine. I don't get any messages to say why. The input just sits there with the fullstop going left and right. Any ideas ?

Not a question, but I am vying for your "Least Important Problem of the Day" award. Mozilla makes great products. And,

The recent new "window fades away" when closing Firefox (or upon saving a file) is weirdly annoying and unnecessary imho. Obviously not a deal breaker, but I'd prefer if the window just closed. I don't need to wistfully watch it fade away. Thanks for the chance to offer input. Why am I even writing this.

I sure hope my bookmarks don't disappear like folks I'm seeing here today.

Hello I have an issue going on with the autofill info that I use. When I type my name, my 1st name comes out fine but when I type my last name it's now a misspelled last name. Seems like it all started with a new banking company that I'm with now. I 1st notice it there and I had to fill out forms to correct the info with them and it was kind of a hassle. I noticed that there was one extra letter added to my last name when I looking at my account info. Maybe when I was initially filling out my personal info with them, I might have spelled my last name incorrectly. I'm not sure. Sometimes I type words wrong. I'm not the greatest at typing. But since then I've noticed my auto fill info, my last name, has been bringing up that same incorrect last name. How can I fix that. I see solutions for editing addresses and passwords but nothing about names, personal info. Anybody know how I can fix this. It has become a nuisance. Thank you ahead of time.

Crash submitted, ID = 320cc808-4505-4cba-6e0f-9f2c2955d007 Still happens in troubleshoot mode. Still happens with extensions disabled (Ublock origin, Proton Pass) Started happening since Dec. 5, 2025 System is current with all Debian?Ubuntu updates installed (daily refreshes) Linux Kernel 6.8 on Lenovo Yoga i7 (ca. 2022) with Intel i5 & Intel graphics

I have an old Laptop which works perfectly for what I need, and I use Firefox for my Browser.

I had to shutdown my Laptop and everything seemed Ok on reboot. However, I can no longer access my Gmail account as I apparently "need Chrome" to get access...?

Do I? If so - how do I get it installed on my system?

Thank you

I opened Firefox (V 145.0.2) on my Windows 11 laptop today and noticed that the starting window was the only one open, while I have had at least five windows open for quite some time. The "History|Recently closed windows" option is greyed out. I have closed and restarted Firefox dozens of times and my windows always came back until today. Is that window/tab history stored somewhere where I could recover it?

Thinking about backups of the browser state, I looked for my profile folder and discovered that it is empty - \Users\<username>\AppData\Roaming\mozilla is empty except for a file named vpn.moz. I then discovered that my profile seems instead to be stored under \Users\<username>\AppData\Local\Packages\Mozilla.Firefox_n80bbvh6b1yt2\LocalCache\Roaming\Mozilla\Firefox\Profiles with the folder name e5di8bjy.default-release I now learned that this location is standard for installation via the Microsoft store - the so-called MSIX version. But it is wrong that the "About"profiles" page shows that my profile is in the AppData\Roaming, not the Packages, location. When I try to open that profile folder, I get a message telling me that it is not available on this computer. It seems like the profile info should be aware of the actual location?

You notify us that your Monitoring Plus is going away on December 17, 2025, and you inform us that we can have FREE monitoring of up to 20 email addresses, but there is no info on how/where we can sign up for this FREE service. I've searched all forums and can't find info on this anywhere.

Please advise ASAP, thanks.

trying to update old version of Firefox but seeing error code: ssl_error_no_cypher_overlap and the message "no common encryption algorithm" on a MacBook Pro with OS 10.5.8 - - not the machine I'm using in order to seek help

The installation on my win 11 laptop is doing some odd things (1 - recently lost all extra (unselected) windows on restart, even though set to restore all windows and tabs and 2- opening a new window creates an outdated duplicate of the window I already have open instead of just creating a new window with an empty tab??). So I thought I'd try refreshing it. Well, my "More troubleshooting" page does not have the "Refresh Firefox" button, only the "clear startup cache" appears along with option to run in troubleshooting mode. No Refresh option in teh same page in troubleshooting mode either. I am using the Microsoft Store MSIX installation. I am thinking about uninstalling that one and installing from a Mozilla download instead??

What would be the best way to clean up my installation state since the refresh is not available?

Good morning,

I have been using the Dashlane Password system on my desktop for several years and it works great with Firefox, however, Firefox was recently upgraded (automatically) to Firefox version 145. Now I can no longer access the Dashlane application which contains all of my passwords. What should I do to recover my Dashlane application?

cannot access primary email. idiot firefox requires primary email in order to make backup primary !!!!!!!

Unbelievably poor design.

I have a backup email address, recover codes, phone.

but firefox requires the inaccessible primary email address to make any changes !!!!!@!@!@!!!!!