If you watch the little notifications in the lower left (or sometimes right) corner, can you tell whether Firefox is waiting for some other site?

You also could try opening the Network Monitor (Ctrl+Shift+E) first before loading the page, and then watch whether any of the requests are stalled.

Well, I did that but I don't even know what I'm looking at. I attached an image of what I can see, but this doesn't happen with any other browser, or any FF ESR versions.

Thanks for your assistance.

Shedrock

The green "200" indicate a successful retrieval, but the timeline on the right side is much too slow. First, it should not take a full minute to look up an IP address. In fact, it should take zero time. Then a minute to connect? I don't understand why. Are you using a VPN or proxy that might be interfering with promptly accessing local resources?

I don't us a VPN or proxy. As I previously mentioned, it works on all other browsers without issue. I can use Firefox ESR portable and it works perfectly. I am at a lost as to why this just started happening. I also tried it on all my other PC's, and it's the same results.

Regards,

Shedrock

Something has obviously changed in Firefox since 128.0.3. I can access the link instantly on this version and previous. It is any version after this I have the problem with. I just don't know how to narrow it down as to what can be causing it.

Regards,

Shedrock

Did you also post this to the utorrent forum if they have one? I think that speed and loading is based on the torrent site or loader and if they are slow then it will be slow. Torrent speeds aren't equal to bandwidth speeds those two are different

No, I haven't because it is a local uTorrent installation with a Web GUI. It cannot be a uTorrent issue. It has to be a Firefox issue since a few upgrades ago as I've stated in the above post.

Regards,

Shedrock

I noticed there is a warning symbol on the requests to the local server. Presumably this is because the SSL certificate is not valid, but you have saved an exception?

The Firefox 129 release notes mention a couple changes related to HTTPS connections and DNS. I don't know whether these are relevant, but you could turn them off and see whether that makes any difference:

• "HTTPS is replacing HTTP as the default protocol in the address bar on non-local sites. If a site is not available via HTTPS, Firefox will fall back to HTTP." (To revert, toggle dom.security.https_first_schemeless to false in about:config.)
• "HTTPS DNS records can now be resolved with the operating system's DNS resolver on specific platforms (Windows 11, Linux, Android 10+). Previously this required DNS over HTTPS to be enabled. This capability allows the use of HTTP/3 without needing to use the Alt-Svc header, upgrades requests to HTTPS when the DNS record is present, and enables wider use of ECH." (To revert, toggle network.dns.native_https_query to false in about:config.)

There are hundreds of changes that don't get into the release notes, so there is plenty more to consider if those are not the relevant ones, but more of a needle in a haystack search.

So I spent about 45 mins. to an hour going through all the HTTP references, turning them from true to false etc. I also went through all the instances of TLS but nothing has worked so far. I wish there was a way to compare the actual about:config file with the one I have that actually works so I can narrow it down. Is this possible though?

Kinds regards,

Shedrock

Whoops, I didn't expect you to make changes without any research. Hopefully you can switch those preferences back to the default settings.

Here's the problem: Firefox saves customized preference values from about:config in the prefs.js file in your profile folder. (You can use the about:profiles page to find the respective root profile directories for your different installations, or see Profiles - Where Firefox stores your bookmarks, passwords and other user data.) But if the default value changed from false to true or true to false, that is not recorded as a customization since it was not a user change.

I just tried to print about:config to PDF and after Firefox was nonresponsive for a minute or two the preview did come up. Comparing by eye isn't very efficient, but I don't have any other thoughts at the moment.