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I'm on Windows 11 Pro 23H2. This is a pristine installation, downloaded from mozilla.org, default settings, no add-ons. - Firefox 126.0.1. - There are no cookies, history or cache to clean, since it's a fresh installation. - Connection settings is set default to "Use system proxy settings", although I've also tried setting it up to "No proxy", then restarting Firefox completely, then trying again with a new domain. No change. - DNS over HTTPS is set default to "Default protection". I've also set it to "Off", then restarting Firefox completely, then trying again with a new domain. No change.

I don't what else to try and I don't know what's wrong with Mozilla Firefox.

Can you help?

See video: https://x.com/jdvivar/status/1798859828393332982

Video in Firefox does not run .. no error messages .. nothing. It works fine in other browsers. When I click on the video .. nothing happens. It used to work but not now and I don't think I've changed anything.

Win11 Version 126.0.1 (64-bit)

basically just the title. In the last couple days youtube.com specifically has been borderline unusable for me on firefox. All other websites work fine for me on firesfox and youtube has no issues on other browsers.

When I open Firefox (with administrative privileges) lt won't stay open, it just looks like it going to load my previous season (at least that's what should happen), but after a few seconds it just stops and closes, all at once? Also, I should mention; Firefox is updated, Using Windows 10. I've tried to trouble shoot a little . . .

— Reinstalled Firefox. — I manually delete the files in Startup Cache by navigating to the cache folder in your Firefox profile. — Reinstalling Microsoft Visual C++ 2015 - 2022 Redistributable x86 and x64.

Now, at one point it did open, and I decided to refresh Firefox (removing extensions and restoring to default settings) by going to 'More troubleshooting information' option, then clicking the Refresh Firefox button. Closed it, restarted my laptop, and Firefox, added my usual extension / add-on. (I was thankfully able to save my bookmarks or back them up).

When I was done, I closed it. But when I try to open Firefox, lt won't stay open, it just looks like it going to load my previous season, but after a few seconds it just stops and closes?

Should I just remove Firefox all together from my laptop, and reinstall it??

Ive tried reinstalling firefox because i am not able to download anything with this browser. I thought freshly installing firefox would fix the issue and allow me to download but it didnt. I also am tried to download an addon/extension, and that automatically fails to download. How can i fix this?

A little while ago I noticed that the site I used to test my gamepads (hardwaretester.com/gamepad, formerly known as gamepad-tester.com) stopped working properly. I just assumed this was either something outside of the browser or the website itself was broken. Today I just tested with several other websites and browsers and confirmed that Firefox seems to be the issue. Even in Troubleshooting Mode it was completely broken.

L1, R1, R2, Triangle, Share, Options and the Left Stick seem to be the only things that function properly currently, with the DPad not doing anything and the rest of the face buttons/triggers hitting the wrong buttons. In the case of the right stick, L2 for some reason controls the vertical movement while the physical right stick still works horizontally. This controller works perfectly on the rest of my system, windows sees the proper buttons being pressed and games that support Dualsense work fine without any interference.

Below I have attached two images which show how the website I mentioned used to look, and the second image is how it looks now. I have a feeling some kind of update to Firefox's Gamepad API has broken this, somehow.

previously I added bookmarks to a menu bar at top of firefox. Now I have a bar that displays 2 bookmarks than a >>. I cannot expand this limited display or create a menu to display bookmarks though I can see them by clicking on the >>. Non of the menu suggestions is a fix.

Does anyone know how to control this and get me a more useful bookmarks menu display?

The behavior began with fifteen to twenty crash messages appearing. After which the browser would stop responding and be unable to reach out to the internet.

Network connectivity was confirmed as I was able to access my VPN and corporate teams.

I submitted as many crash reports as I could. Eventually the crash reporter ceased to function. The message is:

Firefox had a problem and crashed. Unfortunately, the crash reporter is unable to submit a report for this crash.

Details: expected value at line 1 column 1

Only a full reboot of the machine restored functionality but only temporarily. It returns after being put into sleep mode.

Running firefox in safe mode does not restore functionality. The behavior persists.

I am fully up to date according to firefox.

I am running a Lenovo Thinkpad Windows 11.

Using Firefox for webmail, There used to be an option to spellcheck a "Composed" message before sending it. Probably after a recent "upgrade", that option seems to have disappeared. True? Can I get the facility back in some way?

Hi. I am getting vertical lines sometimes. I have included two screen shots. I have checked browser.display.document_color_use = 0, and it was zero. I have tired this in Chrome and it works fine. And I tried in Firefox safe mode, and it still does these strange lines on some websites. I am running Windows 10, and have no other graphic issues except these lines. Websites are Windy.com and google maps. Thanks very much! James

Hello. I am not familiar with this end to end encryption that Facebook now does for Messenger but now when I try to use Video Calling/Chat it tells me it is not supported by my browser, Firefox. I have never had any problems with it before. Is there a fix? Thanks

During the past week, my open tabs will crash when I try to open them. All new tabs will crash. There are no crash reports. I cleared my cache but retained cookies. My temporary fix is to close and reopen Firefox. That works until I open another new tab.

heb.com i can login, but my password manager takes me to

accounts.heb.com, & it gives me the error message. I went to

heb.com, logged in & saved it. When I looked at passwords again it had

accounts.heb.com, & I cant edit that. I don't know if its Firefox or HEB.

TL;DR : Disqus comments used to work while using privacy Strict mode now it doesn't.

After years of it working out of the get-go while using Strict mode up till recently (about a year ago this was really low on my priority list) refused to work I though it was my Ad blocker was causing issues but after setting it in the filters to allow and even after turning it off still no dice.

Removed all add-ons tried again still Disqus comment section refused to load in the websites I regularly visit. So after giving up, I just look around in the browser setting to see if there is anything that may cause conflict with certain scripts from running.

A recent Firefox upgrade eliminated my toolbar "History" Icon. I want it back. Please do not suggest a three stroke keyboard alternative. Thank you.

Alan Morrissey

Filled out a form on a Japanese Retail Store website to contact them and couldn't send the message. Message just hung up all day. I think the connection is secure (icon next to Firefox address bar does not have a slash thru it so I think connection is secure). That Firefox icon says it is blocking trackers and cookies on the website and "Enhanced Tracking Protection" is "On". And got message in bottom corner of website saying "ERROR for site owner: Invalid domain for site key". Using up-to-date Firefox browser, Windows 10 and Windows Defender Firewall. (Tried Windows Edge browser and it said connection was insecure so I followed steps to connect to it like changing Privacy settings and switching to a Private Window but it didn't help.) What else can I try to use this Japanese website? (Note: website does not have an email address listed anywhere.)

I had a set of Firefox bookmarks but when I signed into my Firefox on my Surface Pro 3, Firefox automatically imported my Chrome browser. I went back to the library to restore it and the old version was not there.

How do I get my Firefox bookmarks back. I tried to get them from my Android phone and it also has the wrong bookmarks.