I'm also on a Lenovo laptop but I don't think that's the issue.

I'm replying because I am on Debian Linux and have the same issue. My new/old build # is below

Unpacking firefox-esr (140.3.1esr-1~deb13u1) over (128.14.0esr-1~deb13u1)

For now I have reverted to the older build.

Note that I tried running in safe mode and same result.

When I open FF, it tries to load my previous tabs (of which there are MANY). None of the tabs load. A new tab doesn't load either.

I'm replying to this, but I don't want this to be an "Answer" as it's not a solution.

Thank you for your reply, Mark. It helps to know others have the EXACT SAME problem - and on a different OS - so I won't keep trying, thinking it's something wrong on my end. Also helps to know you have already tried safe mode. I tried to update to 140.14.0esr, actually, but since you have tried 140.14.1esr, I won't do it all over again with that one - having to restore my system drive isn't pleasant.

This link said you could contact a "support agent," but I see no way to do that. Is there no way to get a response from Firefox? I was wondering if there might be a simple fix - or if Firefox could be uninstalled and just start over (but what a pain that would be). I have installed another browser for sites that fail because the Firefox version is "old."

                                         HEY FIREFOX SUPPORT - A LITTLE HELP HERE ! ! ! ! ?

AnneF

Obviously it's not normal for Firefox to completely ignore address bar input or bookmark clicks without explanation (such as a time-out error page or other connection error). When this happens, do internal pages work, such as Settings? You could try this to assess the health of Firefox and/or its permission to access the network:

New Profile Test

This takes about 3 minutes, plus the time to test some sites.

Inside Firefox, type or paste about:profiles in the address bar and press Enter/Return to load it.

Take a quick glance at the page and make a mental note of which Profile has this notation: This is the profile in use and it cannot be deleted. That is your current default profile.

Click the "Create a New Profile" button, then click Next. Assign a name like Test2025, ignore the option to relocate the profile folder, and click the Finish button.

Firefox will switch your default profile to the new one, so click the Set as Default Profile button for your regular one to avoid an unwanted surprise at your next startup.

Scroll down to Test2025 and click its Launch profile in new browser button.

Firefox should open a new window that looks like a brand new, uncustomized installation. (Your existing Firefox window(s) should not be affected.) Please ignore any tabs enticing you to connect to a Sync account or to activate extensions found on your system to get a clean test.

Can Firefox access sites in the new profile?

When you are done with the experiment, you can close the extra window without affecting your regular Firefox profile. (Test2025 will remain available for future testing.)