Having trouble with the new Firefox update. Can you help steer me?

I don’t like the changes in 89.0 and I don’t know how to reset them.

1. When I open a new tab, it goes to a Firefox page instead of my home page, and I don’t see where to set this. The setting used to be under a link at the top that I don’t see any more.

2. The bookmarks are now in a spaced-out list instead of single spaced. So they used to all fit on my screen vertically, but now I have to scroll down to see all my favorites. Can I adjust this?

3. I don’t like the floating tabs. Do I have a choice?

4. I don’t know where the color used to come from, but it’s gone now. Everything is white. I was able to set a partial background color, but it’s not the same.

I suppose it’s useless to ask why they have to keep messing with things like this, but it seems like the more they update things, the more they take away.