Firefox 社群討論區

When trying to set Firefox to open a file on Windows 11, it is overwritten by Firefox Nightly. I have both branches installed.

This is how it goes when attempting to set Firefox as a default application in my machine:

1. "Apps > Default Apps"
2. .mp4 (for example)
3. click the button below that displays the current default application
4. Firefox Nightly appears in this menu
5. "Choose an app on your PC"
6. "C:\Program Files\Mozilla Firefox" ... "firefox.exe" ... "Open"
7. Firefox Nightly remains in this menu

I cannot get Firefox to appear as an available app in this menu. The only workaround, although inconvenient, is to drag and drop files straight into Firefox.

Any help would be much appreciated. Thanks.

I receive many unwanted/junk/spam emails a day (10 to 20) in my email inbox. How do I stop this influx of junk? right now I am blocking domains, is this the best I can do?

I turned on Firefox this morning and its all changed I have no bookmarks no menu and no search bar I hate this new system Why cant i go back to the previous version ???

Starting the month of February 2026, I cannot get into the following websites anymore to do my on-line shopping. Walmart.com and King Sooper grocery store (Kroeger). I get messages to try again later all the time. If I use another browser such as Edge or Chrome, I can get in no problem. Not sure what is going on??? I chatted with Customer Service Reps at both sites, they don't know why I cannot get in with Firefox, unless some of your security certificates have expired. Help!! - Stan

I have moved my profile to a different location on the hard drive to make backups easier. How do I tell firefox where the profile is now located. c:\users\med\my data\PROFILES\mozillA\*.deFAUlt

I can submit posts on X using Chrome, but Firefox, for some reason, has cut off the portion of the posting box that contains the submit button and other edit features. It simply vanished as of March 10 2026.

I have attached screenshots showing FireFox vs Chrome.

I cleared cache and cookies to no avail. I have the latest Firefox version. 148.0 64 bit. Windows 11 operating system.

I already have Firefox on my laptop and via Mozilla I was asked again to install Firefox. Furthermore I always got the question that I should use it as standard browser. I have no idea what else should I do in that case. If I would install again Firefox, I will lose all the paid apps which run already on the current version. So I am really very confused about the characteristics of this Firefox installation and the strange requests by Mozilla to install Firefox.

I would be delighted if you could me support with checks to find out about the nature of the current Firefox installation or a simple de- and reinstallation instruction of Firefox (and keeping the paid apps like Ad Blocker...).

Thank you in advance for your feedback

Rosemarie

I recently downloaded the ebay app onto my Android phone. Since doing so, when I go to my ebay account on my PC, I cannot put items in My Cart nor can I BUY NOW. The selector arrow does not change to a Hand icon. Everything works as it should on my phone. Contacted ebay support which attempted to correct by having me clear browsing history with no success. They informed me that it was a problem with my browser (Firefox). Any info or suggestions would be well appreciated.

Hi Team,

I am having issues logging in to my Firefox account to sync the browser.

"This profile was previously synced to a different account

To keep your data organized and secure, each Firefox profile can only be synced to one account. To sign in using [email removed]@aftc.co, create a new profile."

When I go to the all trails site, I get a blank page, with only the words, "Please enable JS and disable any ad blocker" I checked my settings, and my ad blocker in Firefox is disabled. I cannot figure out, in my settings, how to verify that my javascript is enabled.

Recently I've had this issue (on reddit) where after I expand a video in the feed, and start scrolling, all the visuals freeze.

I know it's only the visuals, because I can still interact with the website (usually unexpand the video, or pause it) with the image still frozen and audio still playing.

I can fix it by tabbing firefox down, and then up again. While researching I found the profiler, and finally managed to capture the moment it happened.

I'm no stranger to technical stuff but it's a loooot of data to process, I did a "clean" profile recording as well where I did the same action and where it didn't freeze, and I can't really make heads or tails out of what the issue is.

The recording managed to capture the phenomenon and I only clicked twice during that period, to expand two reddit expando videos, the second one is what caused the issue when scrolling. The only thing I see is a spike in memory usage

Not sure if I can (or should) upload the profile recording here or what, but it's been bugging me a lot.

It's pretty tricky to replicate because it seems to be random when and what triggers it, even expanding the same videos doesn't replicate it. Sometimes I go days without it happening, sometimes it happens 6 times in a single session.

I've added some screenshots of various views of the profiler/stack data.

I have an Nvidia RTX 5070ti GPU, hardware acceleration is on, AMD Ryzen 7 9800X3D processor.

I think I might have enabled some rendering settings in about:config, maybe it's related to that but I don't remember exactly what.

Maybe it's due to some windows "game optimisation" or the GPU and CPU-GPU fighting?

I have no problems watching videos while playing games or anything though.

I can't login to my Facebook account? But I can login to other browsers,

Can you please help me on this.

Thanks.

after confirmation and approval nothing changes on screen.