Diễn đàn hỗ trợ Firefox

After most recent Windows 11 and Firefox updates, Firefox will not open on my PC. I thought I had managed to Refresh it today Troubleshooting Mode - got a "Success" message - but that message was overlaid with a box that wanted me to agree to terms and conditions, etc. and when I clicked the Continue button, nothing happened. So I had to close what little of Firefox was on my screen; got the Not Responding message, then the Close or Wait message (waiting is useless), so I hit Close and the error was again reported to Windows (big whoop). Should I uninstall Firefox and start over???? I have no clue how to save all my bookmarks and associated passwords.

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.