Firefox Support Forum

Recently got a new computer with Windows 11, and now whenever I try to play a Youtube video or videos on other sites, Firefox as a whole slows down. There is a delay when starting the video, and at times Firefox stops responding if I try to switch to another tab when this is happening. (Not always, but sometimes).

The delay can be anywhere from 5 to 45 seconds or so, and repeats whenever I pause and unpause a video, or even rewind slightly. This doesn't seem to be buffering, and videos seem to work just fine on Edge. Any idea what could be causing this issue?

Please see the message below recieved on a web site I use daily when i wanted to review some information about my accounts -

406 - Client browser does not accept the MIME type of the requested page. The page you are looking for cannot be opened by your browser because it has a file name extension that your browser does not accept.

On the console log, it is giving a bad gateaway for the post request when I am trying to add photos from the attach option given below. Same issue on mobile app as well.

I'm unable to access my website through my firefox browser recently. I've communicated with the host company and they can access through all browsers including firefox. Please advise.

I have some websites in the internal network with self signed certificate which I have registered in the exceptions. But every time I visit them he asks me to put them back in the exceptions. Is there a way to fix this problem?

I enjoy Firefox browser, but this morning I found that my add on/ extensions do not work and I found that if I try to add any extension recommended by Firefox I get the message " this cannot be installed the file is corrupt", I don't understand. I have tried a refresh, I have went to the fixes in about.config and no matter this situation doesn't change. please advise. I cant include a screenshot because it will not work.

I'm using freshly-downloaded Firefox version 102.2 on a brand new laptop (Windows 11 Pro version 21H2), and every single extension is showing a "Installation aborted because the add-on appears to be corrupt" message when I try to install. I have tried checking for updates, quitting and reopening firefox, restarting my computer, refreshing firefox, uninstalling and reinstalling firefox, as well as any and all combinations of those. I've scoured these message boards and nothing is working for me. Please help!

Whenever I try to full screen a video the first time I open the browser, the video will not completely fill the screen. It only happens on firefox and the first time I open the browser. I thought it was my extensions but it was not that. A thread was created on reddit describing the problem I have. I have linked it here. https://www.reddit.com/r/firefox/comments/rhwuvz/firefox_full_screen_on_win11_always_leaves_some/ I tried to change themes and that also did not work. Not sure what the problem is. Please help.

• • Hamburger menu PASSWORDS!!! It's open invitation to steal passwords!!! even from family members think about it!!!...Not that it's happen yet but...Ok scenario GUEST or THIEF using my laptop or desktop they open menu PASSWORDS BAMMMM out in open? Did you guys really think about that? maybe should be PASSWORD to open that in menu?...Not telling you to fix but please can you fix it ASAP?

after updating 102, I noticed that when I wanna download file from websites, after I click Save or Cancel in the dialog, my Firefox will get no response for 1-2 seconds, I have tried troubleshoot mode, cleaning cache, but both not working.

Thx.

Hello,

I get Secure Connection Failed - SSL_ERROR_HANDSHAKE_UNEXPECTED_ALERT error code randomly while trying to open youtube.com. It works with other browser. Please help to solve this problem.

The present configuration of Bookmarks:

Both "areas" of Bookmarks are linked, deleting from one will update the other. Neither are isolated personal storage areas for selected bookmarks of the user's choosing. You can't keep/delete one bookmark in one area (Bookmarks toolbar and/or hamburger icon > Bookmarks) without the action being correspondingly reflected in the other area.

Now previously I could go to the hamburger Bookmarks, create and delete without my tool bar Bookmarks being effected. Any chance of this happening again please?

You can't disable firefox spell checking. Check your spelling as you type. Misconfiguration? Did you make a mistake somewhere? I'm not sure. I mainly use two types of IME, Microsoft IME and google Japanese input.

Hey, some websites break and show weird fonts when the option to let them use their own font is disabled from the prefernces settings. Is there anyway to allow an individual website to use their font if they want to?

I resort to "Logins & Passwords" fairly often and would like my old default setting back: before one of the recent updates, I used to simply find my choice, that is "sort by last modification", coherently conserved upon each launch.

I have tried every troubleshooting from the other answers available on the support website but whenever I am trying to login, it shows a black screen and I also unregistered Twitter from about:serviceworkers but still nothing, I also cannot upload the screenshot here it just says uploading and nothing else. Images are not uploading even from other devices.

Here is one of the errors showing on the console: Cross-Origin Request Blocked

Update: this issue was because of a filter from uBlock's list. Fixed now. I am not sure how to close my question.