Firefox Community Forum

Firefox (129.0.2) displays "401 - Unauthorized: Access is denied due to invalid credentials" (see attached image)

I have tried various combinations of setting and not setting the following in Firefox:

• network.negotiate-auth.trusted-uris
• network.negotiate-auth.delegation-uris
• network.auth.use-sspi

For the URI settings I have tried both .domainname.domainextension and https://servicename.domainname.domainextension

In Windows 10 Control Panel -> Internet Options, the site is in "Trusted sites" using a domain wildcard, and also "Local intranet" and both "Automatic logon" and "Enable Integrated Windows Authentication" are enabled. I suspect those setting aren't relevant since other browsers are authenticating without error or prompt, but calling this out to show that I've covered that base.

The web service is served by IIS 10.0 on Windows Server 2022 and the authentication provider list only includes Negotiate, but I don't believe this issue has anything to do with IIS or its configuration as, again, other browsers are authenticating without error or prompt.

Anything else to check?

Thank you for any guidance you can offer.

Firefox 129.0.2 (64-bit) Mozilla Firefox Snap for Ubuntu canonical-002 - 1.0

Running on kubuntu Linux 24.04, kernel version 6.8.0-41-generic (64-bit) KDE Plasma Version 5.27.11 Qt Version 5.15.13

I've posted a description of my problem on the kubuntu forums: https://www.kubuntuforums.net/forum/newbie-support/help-the-new-guy/681835-firefox-eating-up-a-lot-of-cpu

Here is a synopsis of my posts on that thread to distill the most noteworthy symptoms:

I have snap Firefox installed.

$ snap list Name Version Rev Tracking Publisher Notes bare 1.0 5 latest/stable canonical✓ base core22 20240731 1564 latest/stable canonical✓ base firefox 129.0.2-1 4793 latest/stable mozilla✓ - firmware-updater 0+git.5007558 127 latest/stable/… canonical✓ - gnome-42-2204 0+git.510a601 176 latest/stable/… canonical✓ - gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ - snapd 2.63 21759 latest/stable canonical✓ snapd thunderbird 128.1.0esr-1 507 latest/stable/… canonical✓ - $

If I start firefox from the shell command line, it runs fine. It runs the shell script in /usr/bin/firefox, which ultimately executes /snap/bin/firefox. Clearly that shell script is doing some configuration that I don't understand.

If I​ hit Alt-space I see the menu in the referenced screen grab (see attached).

If I select the first entry, to run firefox from the command line, it has the same effect as starting /usr/bin/firefox from a bash shell; it works fine. However, if I select the third entry, firefox does not play any video; I've mostly tested with YouTube videos that have actual video and audio.

I'm not sure what gets executed when I select the third option from the Alt-space menu. It appears from doing a "ps -ef" that it's the same /snap/firefox/... executable. But I'm wondering why is this entry in the Alt-space menu and how does it get initialized or 'configured' to run.

Additionally, if I do start firefox from the entry with the firefox browser icon, and it fails to play video, I must then uninstall firefox using snap and then reinstall in order to get video playback to work. That is, after a failed start, simply exiting firefox and restarting it from the shell command line will not work; firefox will not play video correctly at all.

I also noticed that on my PC desktop, "snap list" lists firefox as "firefox 129.0.2-1 4793 latest/stable mozilla✓ -"

But on my old Lenova laptop running the same kubuntu version, "snap list" lists firefox as "firefox 129.0.2-1 4757 latest/stable mozilla✓ -"

​I'm up to date on both systems via "sudo apt update"' and "sudo apt upgrade"

Even more frustrating, today, for the first time, despite starting firefox from the command line, video still didn't play. I had to uninstall firefox and reinstall it.

Hello, PG&E just updated their webpage and it doesn't allow me to sign in. It informs me that Fire Fox isn't a compatible browser, all other websites are fine. It suggests Chrome as the preferred browser. We pay our utilities through their site and we enjoy Fire Fox.Can anyone help resolve this issue? Thanks

I have been running into issues if Firefox affecting other programs. One example - closing a game from the big fish game manager. Normal termination of the game hangs up. Closing firefox, usually via the windows task manager, frees up the game manager and the game properly terminates. However, before having task manager close firefox, I see a number anywhere from 6 to 12 or more - firefox(10) for example - trying to re-launch firefox gets an endless round of messages about firefox not responding and a request to close firefox. So far I have only found one effective workaround to this issue. Booting into safe mode and clearing temp and prefetch. This usually holds but I have been seeing this every day for the last 4 days. What is going on and how do I fix it?

I am unable to login to Spectrum.net. I was able to login until a couple of days ago. I can login through Edge but I don't want to use Edge. I contacted Spectrum and since I can log in through edge they say it is a browser problem.

Hi, I try to visit my website ahsapsaksi.com. When I visit on firefox(Desktop and ios). I see the isimtescil template which is the old version of the website. However when I access from another browser like opera I see the updated website(welcome to acme page) only with VPN connection. I tried to delete cookies, visited in private tab etc., however I couldn't manage to see my updated website in firefox(in both desktop and ios).

Can you help me please?

Now a new update. When I visit the website on firefox with VPN connection, I saw the updated version, and from now on I cannot see the website without the VPN at all. I dont understand what is going on. But I tried to clear that cookie many times. Now it looks like the cookie is deleted not by deleting in the settings but using VPN. Now the problem is I cannot visit the website without VPN. Can you explain my experience? why did it happen?

All of a sudden, when I hover over a tab, a small window of the web site that tab is in, appears. Never happened before.

I did go into Performance Options - Visual Effects and unchecked "enable peek," but it didn't work.

How do I stop these windows from appearing?

Windows 10.

I've been experiencing issues with my firefox browser (most updated version 129.0.2, running on Mac Sonoma 14.6.1). Seemingly at random times, it decides to start displaying weird symbols all over. The settings, the menu, the text on webpages, it all reverts to these weird symbols. Restarting the app and my laptop works sometimes, but only for a little bit of time then a day or two later this starts to happen again. I've tried to look at other help articles but it doesn't seem to be a font thing, it's becoming really frustrating and I hope there's an easy fix otherwise I won't be able to keep using this browser as I share my screen for work often.

This is what sows when i try to get newsmax.com I tired newsmax.com but get the same message as below.

Secure Connection Failed

An error occurred during a connection to www.newsmax.com.

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

I always been able to connect w/newsmax.com - until now. When it does not connect tells me to contact that site. Well... I tried and I can not get in to let them know. How do I fix this problem? Thank you in advance for your assistance and reply. Sandra

When using the Firefox browser I find that You Tube videos freeze up after a short while, and the whole website becomes unresponsive. I do not have this problem if I use the Chrome browser, so apparently the problem is specific to the Firefox browser.

Somebody better answer me as I am about to switch my default browser from Firefox to something else. I have already asked this question but never received any response. For a long time now I keep running across sites that do not work on Firefox. It can be a streaming site such as Paramount+ or it could be my phone service site Ting. In all of the cases and there have been quite a few I am always able to find another browser the sites will work on. 9 times out of 10 they will work on Chrome but I have found at least one that does not work there but will work on Edge. So, right now Edge is the prime candidate to switch to. I do not want to quit as it would be a pain in the ass as I have been a loyal user for at least 15 years and have stuck with you as I believe in what you are doing and represent but it is becoming to much of a pain to continue using you because I like the convenience of using only 1 browser 99% of the time. I hope to hear from somebody this time. If not I won't be here for much longer. Thanks, Bruce Hansen bjhansen53@yahoo.com

trying to log into stockstotrade, cookies is blocking entry. notice say they dont support. last week i could acces now i cant. i am a user not a programer every day more BS. wolfba42@yahoo. gmail want to copy my yahoo i spent more time being to change this ant that get little else done. frusttrated

After running scannow and chkdisk on my Win 11 laptop, the fonts for menus and toolbars in Firefox (not for web pages) is unreadably small (about 6pt). I have tried adjusting layout.css.devPixelsPerPx, ui.textScaleFactor, and browser.display.os-zoom-behavior to recommended valus as well as above or below values. So far, no help. Please advise.

Up until the last couple days I have been able, for years, to enter a search query in the search bar. It no longer works, but the bar is still there.

Will this be fixed? Kind of a deal breaker for me. I have this functionality with other browsers.

Why doesn't Rumble work well on Firefox? Other browsers (Chrome) play the videos smoothly & quickly with no hangups or glitches, but Firefox constantly plays (eventually) audio but not video - it hangs up on the thumbnail. If I refresh about a thousand times the video will play. I thought this was a Rumble issue, but the site is smooth and problem-free on Chrome. I love using Firefox! Is there a setting I need to change, or is there an update Firefox could do? Thanks!