Diễn đàn hỗ trợ Firefox

Hi!

We have a intranet site that works in Edge and Chrome without issues with the site added to "internet options". But for some reason we are getting 401 Unauthorized when trying to access it from Firefox. I have tried adding the urls to: network.automatic-ntlm-auth.trusted-uris network.automatic-ntlm-auth.allow-proxies: true network.automatic-ntlm-auth.allow-non-fqdn: true network.auth.force-generic-ntlm: false network.auth.force-generic-ntlm-v1: false

Ingocnito mode , same error. I have tried disabling all plugins. Disabled DNS over HTTPS.

HTTP/1.1 401 Unauthorized Server: Microsoft-IIS/10.0 WWW-Authenticate: Negotiate X-Powered-By: ASP.NET Date: Mon, 25 May 2026 08:15:41 GMT Content-Length: 0

Regards Rasmus

I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

when i use Chrome or edge to access yahoo email I can write & edit. when using Firefox browser; I cannot write & edit/highlight/change text colours etc before sending. tried deleteing & re-installing Firefox . please help. Driving me crazy rsvp

My VPN has. stopped working although it has reset as it does monthly, worked fine a week ago, Still have 50 gig and won't engage with server? any help appreciated....

I was creating two-factor authentication for my account and when I tried to create a passkey the only options were to use iPhone, iPad, or Android device, or Security key (see screenshot).

There's no option to add the passkey to a password manager (I'm using BitWarden).

I'm using Firefox Version 155.0 (64-bit) on Windows 11 (25H2).

Hi,

if I try to open an uploaded project, Firefox shows me just the "Loading"-Animation. This war reproduced on several PC's, using a clean profile and the Error-Modus (without Addons). In Firefox fpr MacOS it works.

Knows anybody the problem or can help fix it??

Greetings, Christian

Firefox is saying that there is a problem with my Xfinity internet & advises me not to log in. This happens only on my mac. Firefox seems to work fine on my i pad & i phone. Safari does not show this warning & they are very strict about internet issues. how do I fix this problem?

1- Firefox shows I have windows 10. Not so. I have windows 11 home, version 25H2. This may be problem that causes the issues. 2- Since Update months ago, profiles, bookmarks and passwords disappear constantly only for me to replace manually the bookmarks and passwords to disappear over and over again. Don't need multiple profiles just one that works as in the good old days. Used it for years but cannot find help and ready to delete and just use microsoft edge. Totally out of patience. ?????????????????????????????????????????????????????????????????????

Running 154.0.1 on MacOS 26.6.1. Sometimes firefox stops working and I think I'm having an internet issue. No page able to load, not even a google search. I see the cache is full at 1gb and I clear cache for the last hour. Browser starts working again. To me, the problem doesn't seem like not enough cache capacity but the browser refusing to evict old, stale cache. How do I fix this other than manually clearing the cache? This seems like a bug that should be fixed.

I got a message Firefox software was not updating. I was sent a download in .exe link. ALL of my tabs are not accessing the addresses. I checked Restore All Crashed Tabs. No resets are happening.

Is this due to a bug in the upgrade? What are Mozilla's actions to fix this. I have used Firefox successfully on my high end HP OMEN PC. I do all I can to avoid Microsoft, Google, etc.

I need HELP.

[redacted email and phone# from community support forum]

This message is using an iPhone ProMax. Not good.

Hello!

It's great there is finally a way to change keyboard shortcuts. However, I cannot find a way to change the keyboard shortcuts for previous and next tabs. Ctrl+tab and ctrl+shift+tab are not very comfortable positions. I would much rather have it something like ctrl+alt+left or right.

Is this something I will be able to do soon? or maybe the setting is there and I am just being blind?

Thanks

Mozilla passkey will not download to thumb drive. Am I missing something when attempting to set up a passkey through USB connection? Using Windows 10 on a laptop. Regards, George

The server not found response started right after two changes: 1) Firefox last update 2) opening an account with Mozilla. It usually works on second request but occasionally not. Thanks for your help in advance.

Hello,

When attempting to download extensions on the addons.mozilla.org site, I am continually met with a "An Unexpected Error Occurred." Sometimes clearing cookies fixes the issue, although sometimes I have to clear cookies and restart the browser. This is an issue that has persisted despite changing profiles - even when creating brand new ones to check.

I am stumped because every other mozilla page seems to work fine and about:addons seems to work fine until I try to download one of the recommended extensions there. It then throws the same error, or my inputs just don't work. When I try to open an addons' page in a new tab it just doesn't load. The site will not load in Troubleshoot mode either.

My extensions seem to be working fine! Thus I am really stumped and cannot figure out the issue. I have tried turning my VPN (Proton) off, but that has not seemed to have an effect on the issue. I perused the form but didn't see anything immediately that seemed similar to my issue. Can anyone help?

I'm using Firefox since 2013. Whenever I reset windows I always keep a copy of my profile folder. You can check the attachment. There is 83 copies of backup.

About my email address linked to Firefox [redacted] @ovi.com, Account Disconnected, Sync is off. Sign In to synch hit the OTP wall and OVI email is discontinued. Here is important details: "Nokia Mail powered by Yahoo was discontinued in March 2015. Beginning in March 2015, users were no longer able to sign in, access their existing emails, or send and receive new messages using their Nokia Mail or Nokia Chat address. If they want to save their existing emails, they must copy their existing Nokia Mail to another email service or to their computer before March 2015" Source: https://en.wikipedia.org/wiki/Ovi_(Nokia)#Ovi_Mail

Microsoft offered migration to their Microsoft account to keep backup of [redacted] @ovi.com to their [redacted] @live.com. Any email sent to [redacted] @ovi.com doesn't reach to anyone, it is discontinued. [redacted] @live.com is currently active and maximum internet accounts are linked to [redacted] @live.com.

Also you can match my profile photo from Facebook and LinkedIn. Facebook: https://www.facebook.com/ [redacted] LinkedIn: https://www.linkedin.com/ [redacted]

If you need any further information regarding this issue, like any old OVI email or any further information, I am willing to provide them. I just want to replace [redacted] @ovi.com to [redacted] @live.com that's all.

Thanks for reading. Looking forward for a solution.

edit: redacted emails from public community support forum.

Very many news agencies now require paid subscription to read their articles. I don't want to see those companies lead in for articles in my Firefox home page.

Google news home page (news.google.com/home) has an option and others by clicking the three dots ... to the right of article title lead in. There are multiple choices offered among those options is: HIDE ALL STORIES FROM ------ (it doesn't name the news agency because it is to the right of that SPECIFIC article). Presto no more show up in news.google.com/home.

Now that more and more news vendors require paid subscriptions to read even their first article it is a great feature I have used for years on news.google.com/home. But now I am regularly using Firefox home page and sure miss that feature.

Finally I wish I could afford to pay for so many and truly there are now many require paid subscription to read even the first article. Others let you read one.

Anyway thank you for your consideration. I think it provides a competitive edge if not overwhelmingly complicated to enact.