Has anyone downloaded this? What are your opinions of it? I lost most all my add-ons,my theme didn't work, and the tabs are more like Chrome. It seems a little faster.

I like Firefox.
I don't like it well enough to download the beta opportunities.
Loss of the add-ons is my main reason.

Haven't tried it yet, for most of the reasons you listed. If I wanted to use Chrome I would.

A few of the add ons have come back, so I am happy about that. I found a theme that works. All is good or better for now.