Firefox Community Forum

On Windows 10 with 64-bit Firefox, after updating from version 144 to 145, some local HTTP-only servers stopped working and became inaccessible. When I enter http://<local server name>, after a few seconds it automatically changes to https://<local server name>, and since no HTTPS service is running, it ends with a “Server not found” page. It seems to be related to DNS — accessing http://<IP address> works fine.

I tried a clean installation with a new user profile, but it didn’t help. Downgrading to version 144 fixes the problem, but at the cost of losing the user profile (which is a disaster). I also tried to check the HTTP-only settings (which I’ve never modified), but that didn’t help either.

Is anyone else experiencing the same issue?

Hey, I am currently working on an application where I want to upload files to a server using mtls via a webapp. The upload goes to another url and server than the one where the webapp is served from. If I test the file uploading without mTLS, it succeeds, and with mTLS enabled it also works in chromium, but in Firefox I get the following error: "Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at <url> (Reason: CORS request did not succeed). Status code: (null)." on the `OPTIONS` request before the `PUT` is done. The client and the server both have a certificate from a custom CA, which I imported into firefox, along with the private key. Does someone know what the issue here might be? I am suspecting that there is some problem with firefox loading the user certificate on the preflight request?

Getting too many scams sent to computer and phone. How do I block these unauthorized UPLs from getting on my computer? There a no three dots on the right side of my Firefox to get the menu to enter Options and proceed to drop down menu to hit Block. What am I doing wrong?

Hi, I recently visited what I thought was a valid website only to get bombarded with ransomware popups. They state that my McAfee account has expired, an account that I never had, and they insist that I click their link to repair it. It doesn't appear to be a hack or that it is currently mining any info from my account. Obviously, I know better than to click on the link ( one of which is: d3venj8hubcc73ch6bp0.texonnerro.co.in TROJAN VIRUS FOUND Click here to secure your data. There are 4 different messages but all have the same URL address). It's really just annoying at this point. Also, it is specific to my Firefox browser. I have no issues when I use MS Edge. I looked to see if I could uninstall Firefox but did not find any way to do that. I know I would lose all my settings, etc doing that, but if that's the only solution, then so be it. Any assistance you can provide will be greatly appreciated.

The attached image is one of the messages. They're using your logo to make it look authentic

Thank you.

Hi, after the last update I got this message that resides above my browser window:

The security sandbox is disabled. Your configuration is unsupported and less secure

I'm on Windows 11.