Ok. Here goes.

1)First good news then the bad news. Good news. First image shows you can copy and paste text. Now the bad news, you cannot copy and paste in the floating tabs except for the url box. Boat browser does not have this feature. I also tried this on my Galaxy Note 3 and it didn't work there either so this feature is missing from the app. Sorry about that Dave999! One bright spot, you can copy and paste in multiple nonfloating tabbed screens you can create.
2)In portrait you cannot put images side by side and resize them such that they fit the screen. However they can be side by side with part of the window outside the main screen (not shown).
3)Top and Botton layout like multiview on galaxy note looks pretty good
4)Also Side by side in landscape works.

Just a couple more notes about the floating tab features. If you look at the x in the top right corner of the floating window you will see two rectangles to the left of it. The first one, when pressed makes the window go full screen. If you press the same relative place when full screen (you'll now see two overlapping rectangles that you press) it will go back in size to the original floating window. This is nice! The next box to the left does not properly work on Jolla. On my galaxy note, when pressed it puts window in background
and you can reopen in by going to the notification bar. I like this! Unfortunately on Jolla phone it just closes the window.
Another thing is you can't open, say, youtube from the browser and make it a floating tab (at least I couldn't get it work). But you can stream videos from other sources like cnn in a floating window.

So there you go. Hope you found this useful

EDIT: I added one more shot of a side by side to show how they fit the screen. Btw both images of Michael Jackson were streaming simultaneously on the screen.