Firefox コミュニティフォーラム

For a while now firefox has been unable to enter fullscreen when pressing F11. Instead all it does is move the "Scroll forwards", "Open a new tab", and "List all tabs" button over slightly (The buttons on the top right, next to the minimize and close buttons).

I don't know what's going on with firefox.

Firefox Version 142.0.1 (64-bit)

General / Startup / Open previous windows and tabs is set off; nonetheless it opens them.

This is on 142.1.0 64 bit Windows.

How can we turn it OFF?

.: Hello. A couple of days ago Firefox stopped displaying thumbnails of YouTube videos. I tried YouTube on other browsers and the thumbnails appeared as usual. On Firefox, they've disappeared, but only on my Windows 10 computer. The YouTube thumbnails appear on Firefox on my MacBook. The attached graphic shows what it looks like on my Win 10 computer.

Any ideas on how to solve this would be greatly appreciated. I have also searched the Internet and YouTube for a solution, but was unable to find one that works.

Thank you.

When I swipe to the left, Firefox navigates Back & when I swipe to the right, Firefox navigates Forwards. It is VERY ANNOYING!!!! It's really easy to do this accidentally while scrolling around a large web page. When you go back, it deletes all data that was filled out on the web form causing DOUBLE the work. How do I turn it off please? Win 10, FF 142.0.1 64-Bit

Best regards,

At the beginning of 2025, I created a private theme and installed it locally (Windows 10), consisting of a manifest.json and a GIF file. It worked perfectly. Now, on Windows 11, I'm trying to use the theme again, but when I upload the file (.zip or .xpi — via about:addons -> Install Add-on From File), I always get the message that the file is corrupted. However, if I test it temporarily under about:debugging, it works immediately without any issues.

I would really appreciate a solution! <3

I can browse and go to websites, but the "back" button is inoperative and the "refresh" buttton is inoperative on my latest Firefox install ... as is the "menu" tab at the top right of the page and everything else at the top (except for the "downloads" tab ... that works, everything else at the top is inoperative

in addition: I get my "home page" set with the links I want (and none that I don't want) and sometimes when I go to a website that I rarely visit, it tosses a "new favorite link" into what I already have customized

also, the "finish setup" tab just below that on the right side is still "active" even though I've finished setup, etc

seem to some or several glitches in this version

thanks for any help

Wolf

[edited email from public]

Rebuilt my computer, restored Bookmarks from 'bookmarks-2025-08-30.html' but the original 'Other bookmarks' (just below 'Bookmarks toolbar') is now empty and has been moved to the bottom of all my other bookmarks in a new 'Other Bookmarks' folder. How do I get the contents back in the 'Other bookmarks' (just below 'Bookmarks toolbar'). P.S. I have a backed up 'bookmarks-2025-08-30.json' as well as a ' bookmarks-2025-08-30.html' available, if that would help. Regards and Best, NP_145

When I sign in, multiple firefox open, causing my machine to run slow. I have to go to task manager, close all the firefox and start over. I usually have to do this several times before I can get signed on. Once on, the new Windows 11 seems to work well with Firefox.

I noted in the multiple firefox accounts the following Group or User Names in the Details section. Are these normal or could they be the source of my problems???

ALL APPLICATION PACKAGES ALL RESTRICTED APPLICATION PACKAGES ACCOUNT UNKOWN (S-1-15-3-1024-1238444810-1356253261-2257478630-1143196962-1563090664-2414759320-12821011916-4218287853) Following these were the regular System Admin groups I am used to seeing.

How to correct if a problem.

It seems that my main page settings aren't the same from one computer to the other. For instance, I use Roboforms password keeper and have an icon for it above the bookmark ribbon on one computer, but moving to the newer computer, that is missing. What am I doing wrong?

The bookmarks on my taskbar are all of a sudden not showing up. I'm unable to drag them there like I used to. Also, the history and menu button on the upper right don't work now. I've restarted with no luck.

When I'm playing videos on Mozilla and close the lid on my MacBook and reopen it, the video resumes playing. Is there a way to make the video pause when i close the lid and the video remains paused, when reopened? Just so used to this feature and really wanna avoid any embarrassment in public.

So i've lost access to my email on. my old mozilla accounts and upon logging in on a new device im being asked for a code to the email which i don't have access to anymore is there a way that my info can be synced to a new one. Thanks

Is there any way to find out if a point release is coming? In other words, I'm running 142.0.1. I'd like to know if a 142.0.2 is going to be released. Not necessarily when, but just if one is in the works and will be released at some point.

Thanks.

My company just changed primary severs and correspondingly, our email address.I want to sync my bookmarks, tabs etc... but since my account email has changed, I can't log into Firefox because the verification code is being sent to my now disabled email. I have opened a new account with Firefox using my now current email. Is there a way to still sync my previous saves and bookmarks? I have an Account Recovery Key for my previous account with the disabled email.

Whenever I start my machine, without opening Firefox, Ctrl-Shift-I works (For inverting selections in certain programs, for example).

However, once I open Firefox, these 3 keys no longer work when used together (but work in any other combo).

This persists even when I close Firefox, or kill it in Task manager.

Any ideas?

Cheers

While using Yahoo news comment editor to enter a comment: the screen will frequently reset with a flash and some of what I was typing will disappear and the cursor goes to default position.

Warning Unresponsive script, this popup causes many issues as I use many tabs and it will get the popup and the only choice I have is to say continue, that then redirects me to that tab, so what I was doing gets interrupted. I have to go and find the tab I was working in when I may get another popup. I've had it where I've had popup under other popups, I tried the extending the time but that seemed to make things worse.

I need to totally disable that popup, tell me how.

Firefox I'm getting nothing done, Do I really need to use chrome?