Firefox Community Forum

Latest version of Firefox browser (142.1) recently installed on my laptop and desktop both running Windows 10. The former continues to support Flightradar 24. The latter no longer does. Message reads 'Unfortunately, your current browser does not support WebGL2 . . . most major browsers (including Firefox) do'! Is there a reason for this anomaly, please? Plus a solution? Malcolm Stride

Hi, since the latet update thi week (20 november) my F1TV doesnt work anymore via https://f1tv.formula1.com/.

It states : Unsupported Browser

This browser is currently unsupported. To experience F1 TV, please switch to an alternative browser. Please see our FAQs for more information

Pleae help as this weekend is La Vega F1. Thank! Erik.

Have recently updated Firefox and now I am not able to login to my Yahoo mail. I know it is not an issue with security on my PC as I can login no problem with Chrome and have tried with AV and Firewall turned off. Tried emptying cache etc but nothing worked. Eventually backed up bookmarks and passwords and deleted Firefox completely, including all files and profiles, reinstalled and still the same problem. Am running win7 and YES, I know this is not supported now but evertything was fine until new update.

After trying to log in it says 'something went wrong, try from a different device'. It works fine on my laptop with Firefox and fine on PC with Chrome so can only come to the conclusion it is Firefox update on PC. This is causing major problems now as can only access mail through Chrome and site links sent cannot be opened as passwords are saved in Firefox. Also have other work that needs to be urgently completed where I need to be able to use sites and mail on same browser.

Any ideas on what could be wrong would be appreciated as things are getting desperate.

This is the message I get when I try to access my Bookmarks: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." I have already tried to find out from Microsoft if their latest reinstallation of Office Professional could have caused the problem. They say they have nothing to do with Firefox. How can I get my Bookmarks and History back?

I love Firefox and generally really appreciate the way y'all operate as a company and developer.

However, I really don't like this new function to add tabs to a group. Since it rolled out, I'm always adding tabs into groups when I don't mean to. Really, it's creating a group almost every time I move a tab around. If I delete the group, it's just more clicks and distractions to deal with.

In the past, when you've rolled out new features like this, you've also made it very easy to turn off any new feature we don't like. But I can't figure out how to turn this off. Is it possible?

Thanks for your help.

Hello. i noticed that my shortcuts are missing. i went to settings to check if it's enabled (check mark) and it is in fact enabled. tried to reset my computer and the shortcuts are still not there. on the main firefox page there is actually no shortcut icons on there...at all. all of the options in settings work with the exception (of course) the shortcuts. i would like to know why this is happening...thx

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.

hello. my name is Andrew. im learning the language toki pona. great language! however, it does not currently have support in Unicode.

as a workaround to use this language online, people have been downloading a font called nasin nanpa, and adding it to firefox's font fallback system in the about:config settings, and using the fonts UCSUR characters, like these 󱥬, 󱥂​󱤴​󱤧​󱤑​󱦐󱤄󱤽󱤧󱤊󱥵󱦑.

[specifically, the font uses codepoints in the Private Use Area because the language's script is not yet in Unicode. ]

the changes are to these settings.

font.name-list.cursive.x-western font.name-list.monospace.x-western font.name-list.sans-serif.x-western font.name-list.serif.x-western

recently, this system has stopped working. this change breaks multiple websites, including many discord community's that used the font to talk online in toki pona!

it also presumably breaks other fallback scenarios. now im guessing that this has not been noticed as most fonts support every commonly used character, making this feature rather obscure. however i really would love this to be fixed, and so would the large toki pona community!

to see what i mean better, please see the below images. the last image shows a website that loads this font on it's own, showing what the others should look like.

How do I remove the pop up blocker on Firefox for certain websites? I am doing an online course and each introduction for each chapter has a short video that pops up but as soon as that happens Firefox sends a "Critical error" message then the video stops so I thinks that's happening because pop up blocker is turned on and I just dont know how to turn pop up blocker off for specific websites only like this one I am using for my study course. How can I turn the pop up blocker just for this one website so that this doesn't keep happening?

I despise ai in every use and way with a passion. Now, it gets spammed everywhere on this browser, with no apparent way to disable and/or remove that filth. I don't want to see it, ever! Why is it even on by default??? I don't want "chatbots", "Ai assistants" or any of that shit at all.

In version 146.0.1, or perhaps even earlier, I noticed that if you set a Primary Password to log in to the browser, you can reset it and log in simply by clicking the "Cancel" button. This allows you to access all of your user tabs and links. I hadn't noticed this before. It defeats the purpose of setting a Primary Password. I noticed similar issues in the Tor browser, but you can't set a Primary Password there at all, even though the feature is there, and it's built on the Fire Fox engine. Please fix this issue. No buttons should allow you to log in without entering the correct Primary Password.

Hello, I have Facebook Container installed (Windows 11) on my desktop. However, if I click a link to a FB page, say in an email or on a webpage, Facebook opens onto the current tab and makes it a container tab. Since I can not go back once FB is opened in the container tab, I have to open a new tab and go back to the original (pre FB) webpage. This is the only time this happens.

What settings can I change so that the Facebook Container opens Facebook into a new tab, not on top of an existing open tab?

Many thanks for the millions of us that are computer challenged.