Firefox Community Forum

I'm getting announcements of a virus threat that purports to come from Mozilla Firefox. Usually one or all three of the attached small windows that say: 1. "Viruses Found. Antivirus notification. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 2. Attention! Click here to secure your data!. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 3. "System Warning!. Click here to remove them! via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. I have run full scans and offline scans with MS Defender, but these warnings still appear. Is this legit? I suspect these are a virus of some sort. Either way, how do I deal with this?

For the very first time, today I got the following, "Gah. Your tab just crashed." and it now happens every time. What's up? Is this a Mozilla problem? Should I be moving on to a new browser? Help!

i AM SHOWING 2 FIREFOX ICONS ON MY TASK BAR --THIS HAPPENED SUDDENLY ! I checked the apps and it shows 1 for firefox which is X64EN-US 322 MB--I did not uninstall,so what can I do to solve this ?

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

Despite having the setting "Ctrl+Tab cycles through tabs in recently used order" selected, CTRL-Tab has suddenly stopped cycling tabs in the most recently used order. Firefox behaves as if the setting is disabled. This is the third time I've experienced this issue in the past year, and every time the only solution that worked was to create a new profile. It is exhausting to get a new profile back to exactly how the old profile was, and it's something I shouldn't have to do.

Scenario: I am on Windows 11 (though this has also happened to me on Windows 10), currently using version 146.0.1 (though this has happened on previous versions). CTRL-Tab cycles in the most recently used order just fine for several months, then it suddenly doesn't—this happens in the middle of an active session, i.e., not after a restart of the browser nor the computer itself. I have four add-ons, none of which control tab cycling, nor have I added/removed any add-ons nor changed any of their settings since their initial installation many months ago.

What I've tried:

• Disabling/re-enabling the setting (even though it is already checked)
• Disabling/re-enabling the config browser.ctrlTab.sortByRecentlyUsed
• Restarting Firefox normally
• Restarting with add-ons disabled—note that the issue persists even with add-ons disabled
• Disabling the setting, then restarting Firefox, then re-enabling the setting
• Restarting the computer

It's the same thing described in this Reddit thread. What else can I try?

when I go to a web site I get an error msg saying You don't have permission to access "http://www.att.com/" on this server. why and what does it mean and how do i fix it?

Reposting until I get help from someone. Windows/desktop. On Google Chrome, any streaming website I used with autoplay enabled would KEEP full screen mode ON after changing episodes. It would automatically go to a new page with the following episode and remain full screen. Why doesn't Firefox have this feature?? I'm seriously considering going back to Google Chrome for this one small feature. Every time I had any streaming service playing with autoplay enabled, I didn't have to manually select the full screen option every time. I am having to stand up and manually click full screen function. Every. Single. Time. Somebody please help me if there's a way to active that function.

The helpful suggestion that someone offers for a solution is appreciated, however, for me there are no "arrows" to use as instructed in order to fix my problem, e.g., stopping drop-down/pop-ups that reveal of my ID when signing in for both Amazon or Mozilla web sites.

Still not always saving a page to my selected folder. However, if after clicking the "Star", I first select the location "Show your bookmarks", then to back to to selecting the folder into which I wish to save the page, it will then put that page into the folder of my choice. What settings do I need to have in place so that I do not have to do this double step to get the system to save a page in my selected folder? Let me know if I should just start over, uninstall Fire Fox, I have saved all my book marks and exported in the two formats, then reinstall the program. Thanks in advance for any solution. JJE

I have for years used Firefox for logging into BofA. I have not changed my configuration but 4 or 5 months ago I started having problems. My browser is always up to date and I have standard privacy settings. In the past the problem was that the authentication wouldn't work, then firefox would freeze I would have to close the browser - when I restarted I would still be logged in (which seems strange). Now most recently when I log it it doesn't accept my credentials. I have tried removing BofA from enhanced protections and clearning the cookies related to BofA - but the problem persists.

I am logging in on my Apple laptop (by means of password protector) and using a FIDO device for authentication.  I usually get a failure message before I have even activated the FIDO device; then if I try again the whole browser freezes - no windows will work (yet when checking "force quit" it doesn't show it not responding.)

i had a bunch of grouped tabs which i 'closed and saved' but when i tried to find them all of them were gone, only the newer groups i made just now show up, not a single one of my old ones do

With the latest firefox update all my bookmarks do not appear on my windows11 desktop. But the synchronized booksmarks on my win10 note book and on my iphone still exist. So nothing is lost, the bookmarks simply do not show up on the win11 desktop. With this firefox update I also received a desktop message that bookmarks might not appear because of an interference with the internet security program (f-secure) Unfortunately I did not give enough attention to this explaination there and the steps how to solve the problem.

Can somebody send me the link to this explaination or tell me how to fix the bookmark interference with f-secure?

many thanks thomas

For the past few days, DDG search has been slow. I'm using Firefox version 146.0.1 on Windows 11. Disabling extensions didn't help, but clearing the cache had an effect: The first search after clearing cache is fast (about 1 second), but subsequent searches are slow (about 15 seconds). I was able to repeat this sequence several times. I also cleared cookies, but that didn't seem to have any effect. DDG Search works fine in a Private window. I'm stumped!