Firefox Community Forum

I've been using Firefox on device A computer in the evening, and the next day, after opening device B computer from sleep, a tab was open from the device A session (along with some older tabs I kept open, it was placed at the most right location). I am 100% certain I did not have that tab open from previous session on B.

The only way this tab would be able to appear on device B is if I somehow triggered a "send tab to device" functionality when working on device A, however, I am 100% sure I did not. Seeing how I would have to right click the tab and select a submenu to trigger that, it seems essentially impossible that I did that by accident.

Q: 1. Is there a keyboard combo that could be accidentally hit that would trigger Send tab to device? As far as I could research, there is no such shortcut. 2. Can a website trigger this API and perhaps I approved it by accident? I would definitely also notice this. 3. Is there a sync audit log I could check on either device to see if a tab was synced? I found about:sync-log but nothing really useful in there.

This event is so weird that I am considering secirty aspects or a potential exploit vector..

Recently the audio is only coming out of the left side in videos I uploaded from my iPhone. This does not happen in Safari or Chrome where the audio is perfect, only in Firefox for the Mac. I've gone through the usual troubleshooting methods like opening in safe mode, clearing the cookies and cache, checking settings, etc and can't seem to fix this. Can you help? Thank you, Larry

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I am experiencing a weird scaling issue on one of my monitors with Firefox. The whole firefox window looks as if it's scaled to high resolution mode. Not just zoom of the content, but the whole window, including the title, toolbars, etc.

Note that only happens on ONE monitor (I've tried this on total 6 monitors now), and it happens only on one Firefox Profile. If I use a new profile, the issue is gone. However, if I copy the profile folder to the newly created profile, the issue comes back.

Here is a screenshot of the two windows opened at the same time on the same screen. Right window is normal, and the left window is the scaled up version.

https://i.imgur.com/ikq00DA.png

I don't want to re-create my entire profile if I don't have to. Does anyone know what kind of setting/feature did this and how can I revert it? Since it does not happen on a different profile, and is replicable by copying the profile settings, it must be some kind of a firefox setting somewhere.

like the title says, usually at least once a day firefox will just stop loading web pages entirely. more specifically, it gets stuck loading any page infinitely. occasionally if i wait long enough things will start loading again, but usually that time never comes and i have to restart the browser. i'm kind of a tab hoarder so restarting the browser can be annoying in itself, since i have to wait for the browser to load. i'm not really sure how to troubleshoot this with extensions and the like since i haven't noticed any trend in when the problem occurs. weirdly enough, it happened while i was typing this and while every other website fails to load, the mozilla support site is consistently fine. any ideas or suggestions would be greatly appreciated.

Upgraded to FF 142.0 and don't have the Link Preview that was described in the new release info. You can now see what’s behind a link before visiting it with Link Previews. Long press a link (or right-click and choose Preview Link). Previews can optionally include AI-generated key points, which are processed on your device to protect your privacy. Long press does nothing and right click on link doesn't have a preview option. I am using Windows 10 which is current and 64 bit. Don't really care all that much, but they said it was there for EN version and it isn't.

Hi Folks, When I open a particular web site and click login Firefox shows/suggests use of my actual username. I'd like that to NOT happen (i.e. show nothing) for that (or a few) web sites. How do I stop the suggestion of login usernames for a few, selected web sites? Warm regards, Robert Myers ( dr.rbmyers@gmail.com )

I use an IMac (15.6) to sign political petitions online on sources I trust, but the new Firefox version (128.14) seems to require that all GPC be disabled to do so. Can GPC be used selectively? Attached is a typical warning. Thanks for your expert thoughts.

Yesterday (8/19/2025) I updated to Firefox v. 142 from v. 141.0.3. The Firefox update was the last thing I did prior to shutting down my computer. Today, when I booted up with version 142.0 many of my bookmarked websites don't work. I am using a iMac Retina 5k, 27-inch, late 2015 desktop computer using macOS Monterey v. 12.7.6

I called Apple tech department & explained my problem (see above). He had me delete the cookies for Firefox to see if that would correct the problems. It did NOT resolve the problems. He had me switch to Safari browser to see if I could the access the websites with which I was unable to access. I was able to do so. He stated that the problem was with Firefox and that he could NOT help me any further.

I have NOT used Safari for a decade or more and am NOT familiar with it because I found Firefox to be much better and easier to use. Until yesterday, I had NO problems. Now I am desperate to be able to continue to use Firefox but can't access important sites that had been available until the 142 upgrade. HELP, PLEASE

I started using Firefox a few months ago after the new Profile Manager was introduced. Created a bunch of profiles and setup everything the way that I want. Now I started using another PC and want to replicate my setup on it. I thought Sync would be able to do this but it just copied over one profile and it also didn't copy over my Shortcut configuration. Is there a way to duplicate the way Firefox is setup on one PC to another PC, down to every detail? Thanks!

I use debian linux. I do not want GPC because civicshoutfoundation will not allow me to sign petitions. I unclicked "Tell websites not to sell or share my data" but civic shout still says I am using GPC. Is theree another setting I should change?

Allen Altman abu.altman@gmail.com

I am using version 140 on Linux and now two company sites do not work properly when "enhanced trakcing protection" is enabled. The 2 companies are "public mobile" a Cell phone provider and "Voip.ms" a phone provider.

When I log onto public mobile I cannot view my specific account information, I can see other menu information. voip.ms I cannot log on either chat or the main customer portal. This only recently changed within the last 4 days and I am using the same version of firefox.

Can you provide an explanation as to why this is occurring?

As the title suggest - I am unable to access LI at all.

It's not a profile issue because it loads fine on Edge. It's not an extension issue because it causes the same problems in troubleshooting mode, and it does get me to at least the login page on a private window.

Please help. I'm not sure how to resolve this. It's blocking a lot of my work.

Thanks in advance!

for some reason netflix shows a black screen when watching movies. this just started happening. it works if i go into troubleshooting mode. i have no extensions running. i reinstalled the browser. i reset the browser settings. i tried everything that your web site suggests but i have no idea what is causing this to happen.

I keep getting the following message: The STAT command did not succeed. Error getting message number and sizes. Mail server Imap.gmail.com responded [SYS/PERM] Your account is not enabled for POP access.

"Email masks are masked, or private, email addresses that forward messages to your true email address." Question: Does Relay simply consider my login email for my Mozilla account to be my "true email address"? I have more than one email address. Can I have messages to my email mask forwarded to a different address than that used for my Mozilla account?