Φόρουμ υποστήριξης - Firefox

Firefox complete broke for me. I have a Dell XPS laptop with windows 10, purchased about a month ago. Yesterday, when I clicked on firefox, it opened frozen with no menu or toolbar at the top. I restarted my computer to no avail. This morning, I reinstalled firefox. It seemed to be working fine, but now has stopped. Now, when I open it, it is the same. Frozen with no menu or toolbar at the top (see attached screenshot). I have one add-on, which I added, Ad-Block Plus. Any ideas?

Since somewhere last autumn, when I download any file from any website, the browser vanishes without any warning on the moment I navigate to the destination folder.

I maintain 2 websites (Joomla), and last week both required uploading a few files in Phoca Download to make them available to members. Now also on this upload the browser was completely gone when I navigated to the folder where I kept the fles.

I use Firefox since about 1995. I looked in about:Crash (first time ever), there were to reports, both unsubmitted: 69990c58-1a5c-40a3-9141-666607416103 6/22/2020, 1:23 AM e6f0688e-73e4-4c19-8e0a-01ec3c28e996 2/22/2019, 4:09 PM I have submitted them both now.