Firefox Community Forum

About two months ago, after various Windows and Firefox updates, I can no longer make Firefox the default browser. In Windows Default Apps the only option for FF is to make it the default program for Adobe Acrobat Document. Choosing Make FF Default through the browser does not work either. Additionally, I’ tried numerous suggestions, using AI help offered by both FF and Chrome, without success.

The OS is not allowing me to make Firefox the default browser. Is there any way around this?

Any suggestions?

Firefox: 155.0.1 (64-bit) Windows 11 Pro Version: 25H2 OS build: 26200.9278

Thanks

After recent Firefox update in v 154, saved passwords do not auto-fill in all websites. Actually, not even the username is loaded. I tried to open in troubleshoot mode and didn't work too. I tried to log out and re-login and fixed for a while only. Then same issue re-occurred. In websites where I have multiple accounts it's too hard to find the proper one. In the Settings > Passwords everything is enabled.

I used Private Browsing to review a web site, and saved a couple of files to my hard drive. When I closed the Private window and went to a different page in Firefox, then used Print and "Microsoft Print to PDF", the print dialog came up with the Private window's last save location as my initial save location. It doesn't matter whether the regular Firefox window was open before or after the Private window was closed.

This was a leak from Private to Regular. Windows 11. Firefox 155.0.1 (64-bit)

It says to drag and drop but that does not work. I minimized both windows and dragged the one tab to the 'larger' window and nothing happens. My email keeps opening in a new window and it never did before. It was a tab in my original window, and now it is so much harder for me to work.

I am using Firefox Beta 156, Version 4 on Windows 11 Professional, 25H2. I have an odd error, "Look up over IPV6 failed lookup." It occurs on two different VPN's, Proton Free, and Windscribe Professional. Any assistance, or insight would be highly appreciated. Thank you kindly.

i have made sure that all the settings do not force signing out, all settings include save passwords/bookmarks etc.

But... when I close firefox Im forced to sign in when I reopen the browser, it also looses all my bookmarks and passwords and I have to re-import them from the firefox backup.

I have deleted various temp files and force firefox to create new ones.

Can't get around this. It becoming such a farce that I'll abandon firefox and go to Opera!!!

Carleton

Someone claiming to be with Microsoft froze my computer until I answered whether I wanted them to know where I am at. I need protection from hackers like this. I want to be able to do a full scan on my computer.

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 paid for an annual subscription of Mozilla's VPN on 9/8/26. However, when I try to run the VPN, it is telling me I have to wait for the monthly trial (which I had previously to reset). My invoice is 98Z6LFXQ-0001. Also, when I printed a receipt of my purchase, I noticed my zip code is incorrect. My zip code is 11224 (not 11229). I saw that it could possibly take up to four days for my purchase to be reflected, but I wanted to get ahead of this potential problem ASAP. Thank you! Richard Messing @ email: [redacted email from community support forum]