Firefox Tekoha Aty

MacOS Sequoia 15.7.7; Firefox 141.0.2

The "one sentence" in the heading states the problem. I am unable to use Firefox.

Firefox loads. It opens windows (I had fourteen open when I last used it successfully; I have many, many tabs). Then it removes each window from the screen. Firefox is in the Menu bar, but no windows are displayed. The windows still show when selecting Window in the menu bar. Selecting a window has no visible effect. File>New Window opens a new window, which works as expected. With one new window open, File>New Window does not open another.

Typing a few characters in the Address Bar opens a dropdown with a list of tabs, each with the affordance, Switch to Tab. Clicking on one takes down the list but does not open a window.

I would like, for a start, instructions on how to use Firefox starting afresh with no windows. First: having set aside the data that causes this problem. I suppose that might be simply a new profile.

Firefox is stuck in a loop! After installing the 145 update, it just keeps asking me to sign into with my admin credentials to install "a new helper tool" over and over. After entering my password nothing happens and when I try to relaunch, the FF icon just bounces. ("Force Quit" shows that the application is not responding.) After multiple attempts, I rebooted my laptop, but it didn't help, as I still get the request for installing the helper too. I'm in the midst of multiple project deadlines and this is very frustrating! Thanks in advance for your help.

I have looked over this computer high and low for any profile files in every way recommended on this website. I can't find it, regardless of what I put into terminal or what settings I change. This was a problem before the update to tahoe too.

Hello, today I could not launch Firefox on my Mac. Because this is a corporate machine from Kyndryl, I downloaded from Kyndryl App Store, I have rebooted the systems, I have updated iOS to last version, but still haven't solved the issue. This is the situation: Firefox is installed, I click to launch it, I am asked to authenticate with MFA I authenticate correctly, and Firefox just sits at the dock bar jumping, then stops jumping, and nothing else happens. I repeated the process several times, made several reboots, nothing changed. Can you suggest a solution?