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After upgrade to Windows 11, Firefox won't open anymore.

Hi, I've upgraded to Windows 11 today and couldn't open Firefox since. Things I've already tried: Reinstall Firefox and delete all old files (Appdata & Program fi… (read more)

Hi, I've upgraded to Windows 11 today and couldn't open Firefox since. Things I've already tried:

  • Reinstall Firefox and delete all old files (Appdata & Program files)
  • sfc /scannow and DISM.exe /Online /Cleanup-image /Restorehealth
  • Windows compatibilty mode
  • Firefox Troubleshoot mode won't open either
  • ipconfig /release & /flushdns & /renew
  • netsh int ip reset & netsh winsock reset

When opening Firefox in any way, i get a white window/just the window border which immediatly closes. When trying to start troubleshoot mode, the small window has the same issue.

I also checked the crashlogs and none were generated. The Windows event-logger also has no entries.

BTW: Here is a video of whats happening: https://youtu.be/AJP4rqZFxlY

I have no idea what to do - send help please.

Asked by galotta.f 3 months ago

Answered by zeroknight 3 months ago

  • Solved

Missing cookies

I have an issue with Firefox 127 not accepting a session cookie that I use for user authentication. I have an ASP.NET application with a login form that includes fields f… (read more)

I have an issue with Firefox 127 not accepting a session cookie that I use for user authentication. I have an ASP.NET application with a login form that includes fields for login and password, and a submit button. When the button is clicked, an HTTPS/POST request is sent to the server. The server responds and sends back a session cookie named .Cookie.Name with the parameter httpOnly set to true.

When I check in Firefox's Developer Tools under the Network tab, I can see .Cookie.Name in the server response. However, in the Developer Tools under the Storage tab, .Cookie.Name is missing, which prevents the user from logging in. This problem does not occur in other browsers like Chrome or Edge, nor does it occur in Firefox version 126. The configurations for Firefox 126 and 127 are identical.

Could you please assist with this issue?

Asked by LukaszRoki 1 day ago

Answered by LukaszRoki 19 hours ago

not able to find JAVA PLUGIN "JAVA TM PLATFORM SE8 U341 for running digital key

Dear Sir, we are unable to get plugin JAVA TM PLATFORM SE8U341 for running digital key. i have requisite software installed in my system. Please guide. I have attached sc… (read more)

Dear Sir, we are unable to get plugin JAVA TM PLATFORM SE8U341 for running digital key. i have requisite software installed in my system. Please guide. I have attached screenshot regarding the same.

Asked by jayant kumar 1 week ago

Last reply by James 1 week ago

  • Solved

Firefox asks for master password on startup

On my computer Firefox ask for the master password every time at startup. On other computers in my family, Firefox only ask for the Master Password when accessing a site … (read more)

On my computer Firefox ask for the master password every time at startup. On other computers in my family, Firefox only ask for the Master Password when accessing a site with a password. I tried : - to disable than reenable Master Password - start in SafeMode without success. How can I solve my issue ? Thanks in advance for your help

Asked by jp.levy 3 months ago

Answered by cor-el 3 months ago

  • Solved

Graphical problems on Surface Pro X (arm64)

Using the arm64 version of Firefox on a Surface Pro X causes several graphical issues. These issues started either with a update of Firefox or drivers. This topic has al… (read more)

Using the arm64 version of Firefox on a Surface Pro X causes several graphical issues. These issues started either with a update of Firefox or drivers.

This topic has already been reported, please see here for more information and documentation: Reddit: https://www.reddit.com/r/firefox/comments/182iojx/firefox_arm64_graphical_problems_on_surface_pro_x/ Mozilla Connect: https://connect.mozilla.org/t5/discussions/firefox-arm64-graphical-problems-on-surface-pro-x/m-p/52086

What can be done to report this issue and help it getting fixed?

Asked by Felix 3 months ago

Answered by zeroknight 3 months ago

  • Solved

Incredible slow download speeds with 999Mbps connection (below 15Mbps)

Just recently Firefox seems to have its downloads capped at 15-16 meg speedtests show the full 1Gig speed OPERA AND EDGE both download at the full 999 megs but firefox … (read more)

Just recently Firefox seems to have its downloads capped at 15-16 meg speedtests show the full 1Gig speed OPERA AND EDGE both download at the full 999 megs but firefox has recently stopped downloading any faster then 19 meg

what in firefox could be causing this its not happening in any other browser.

Asked by firefox2776 2 months ago

Answered by firefox2776 2 months ago

Where did my Firefox bookmarks go?

I just downloaded the latest Firefox browser, and it asked me to import all of the my bookmarks, but it only grabbed the ones from Chrome. All of my former bookmarks that… (read more)

I just downloaded the latest Firefox browser, and it asked me to import all of the my bookmarks, but it only grabbed the ones from Chrome. All of my former bookmarks that were saved in the previous Firefox browser are gone! Most of my useful bookmarks were in Firefox. Where are they, and how do I get them back?

Asked by cowsters 4 months ago

Last reply by zeroknight 4 months ago

  • Solved

Choppy 4K YouTube playback

I have a very good PC (5800X3D, 7900XT, 32GB DDR4 3600), but Firefox (either the normal, canary and nightly version) can't play smoothly any 4K video (like the Borderland… (read more)

I have a very good PC (5800X3D, 7900XT, 32GB DDR4 3600), but Firefox (either the normal, canary and nightly version) can't play smoothly any 4K video (like the Borderlands trailer: https://www.youtube.com/watch?v=lU_NKNZljoQ ). 1440 and lower resolutions are fine, as are 4K videos on Chrome and Edge. FWIW, my CPU during 4K playback is barely used (1-2%), and my GPU's video codec (VCE) is used by around a third. Disabling HW accel makes things better, as it still stutters but it's (barely) passable. I already tried creating a new profile, but still it's the same.

Asked by Federico Barutto 3 months ago

Answered by zeroknight 3 months ago

problem setting Firefox as default in Windows 11

I can not seem to set Firefox as my default browser. After I correctly setup Firefox as the default , and it shows up as default even in Firefox. Anytime I click on a li… (read more)

I can not seem to set Firefox as my default browser. After I correctly setup Firefox as the default , and it shows up as default even in Firefox. Anytime I click on a link in Outlook it brings up Microsoft Edge. If I setup DuckDuckGo as the default browser, a click on a link brings me to DuckDuckGo. One item that might be the cause of my issue, is that when I go into Apps, in my windows 11 setup, it actually shows two Firefox applications.

Thanks for any help!

Asked by tom435 4 months ago

Last reply by zeroknight 4 months ago

  • Solved

Multiple windows not restoring.

Hi. I am running a 3 monitor setup and I like to keep open quite a few tabs. And two windows of Firefox. So two Firefox instances with several tabs on each. But because i… (read more)

Hi. I am running a 3 monitor setup and I like to keep open quite a few tabs. And two windows of Firefox. So two Firefox instances with several tabs on each. But because it eats a lot of memory, I have to close and reopen Firefox from time to time. And to my annoyance, sometimes it "forgets" about one of the windows. So opens only one instead of both. Therefore I loose some quite important tabs. Any suggestions on how to fix this? Thank you.

Asked by zarsss 4 months ago

Answered by TyDraniu 4 months ago

History Disappeared

After Firefox did an update I opened up Firefox and ALL my history was gone. I still have my bookmarks. But I need my history for the past few weeks and months. I've trie… (read more)

After Firefox did an update I opened up Firefox and ALL my history was gone. I still have my bookmarks. But I need my history for the past few weeks and months. I've tried to search and find it through using an Index.dat analyzer. But when I've tried to use it, nothing was found. I've not shut down my computer since as I want to get this back. How do I do so?

Asked by davedc32 3 months ago

Last reply by davedc32 3 months ago

Firefox Not Launching

I have recently downloaded Firefox on Windows 11. When I first installed it, it worked fine, but it crashed and I couldn't open it again. When I try to open Firefox, a "T… (read more)

I have recently downloaded Firefox on Windows 11. When I first installed it, it worked fine, but it crashed and I couldn't open it again. When I try to open Firefox, a "Troubleshoot Mode" window flashes for less than a second and closes. About 8 months ago, on a different computer with Windows 10, had the exact same problem. I thought it was just because it's ancient, but it does the same thing on my well-functioning computer. I have tried the Microsoft Store Firefox and downloading from the website. I have reinstalled and restarted several times, and my computer is up to date. I do not use any 3rd-party security software. I still cannot launch a Firefox window at all. I love Firefox on mobile and I really want to use it on PC. Thanks for your help!!

Asked by vee_c 3 months ago

Last reply by zeroknight 3 months ago

  • Solved

Bulk user name delete

I would like to select and delete a subset of user names and passwords in Firefox. I have a group of about 80 logins for an old account which I no longer use. I know I ca… (read more)

I would like to select and delete a subset of user names and passwords in Firefox. I have a group of about 80 logins for an old account which I no longer use. I know I can delete individual logins one at a time but doing this 80 times is a pain!

I can search for the particular account in the password list and Firefox lists them all, which is great. What I would like to do then is right click and select all followed by delete.

Is there a shortcut somewhere?

Asked by Spencer.greystrong 4 months ago

Answered by Spencer.greystrong 4 months ago

Firefox and Dashlane are not behaving well together.

Dashlane extension is not loading passwords into Firefox. I have refreshed Firefox and I have reinstalled the Dashlane Password Manager extension for Firefox. It used t… (read more)

Dashlane extension is not loading passwords into Firefox. I have refreshed Firefox and I have reinstalled the Dashlane Password Manager extension for Firefox. It used to work so well. I am using Windows 11.

Asked by Richard 4 months ago

Last reply by Richard 4 months ago

Last Pass Icon for Fiefox - Windows 11 Desktop

No matter what I do I cannot get a Last Pass Icon on my new Dell XPS, Windows 11 Desktop PC. I've used Firefox for yeas and my last OS was Windows 10. That showed the i… (read more)

No matter what I do I cannot get a Last Pass Icon on my new Dell XPS, Windows 11 Desktop PC. I've used Firefox for yeas and my last OS was Windows 10. That showed the icon..this new PC does not

Asked by Kuklapolitan 5 months ago

Last reply by Kuklapolitan 5 months ago

Bottom of Page

Recently, one website (SF Chronicle) started automatically scrolling to the bottom of the page when I access an article. Occurs on no other sites nor on my other devices … (read more)

Recently, one website (SF Chronicle) started automatically scrolling to the bottom of the page when I access an article. Occurs on no other sites nor on my other devices - only an my Dell desktop running windows 11 and the most recent version of Firefox.

When I follow a link to read an article I briefly see the heading but then it immediately scrolls down to the bottom of the page and I have to manually scroll back to the top of the page to read the article.

Asked by sschoech 5 months ago

Last reply by TyDraniu 5 months ago

  • Solved

I cannot log in to websites using Firefox

Firefox is my default browser, but it does not allow me to log in to specific websites. For example, ihg.com, when I click the sign in button nothing happens, I just have… (read more)

Firefox is my default browser, but it does not allow me to log in to specific websites. For example, ihg.com, when I click the sign in button nothing happens, I just have a little note at the bottom left "javascript:void(0);" Another example, dutchcrafters.com , when I click Log in with Gmail, nothing happens.

I have tried removing all the content blocking extensions (privacy badgers, ublock origin, etc.), did not fix it. I have tried a firefox refresh, did not fix it. I have tried uninstalling and reinstalling firefox with several device restarts, did not fix it.

I know this must be a firefox specific problem because microsoft edge work perfectly for both of these examples. Any other suggestions to fix this firefox issue?

Asked by James Lin 4 months ago

Answered by cor-el 4 months ago