Oh, and... He'll have that thing torn to shreds in no time!

Years ago I bought one of those giant trees (when they weren't outrageously expensive) that went floor-to-ceiling. My cats loved it, and it took them nearly two decades to completely destroy it. Tupper, even when he weighed more than 30 pounds, regularly dived off the top platform, from near the ceiling, to the couch three or four feet below. Don't worry about them jumping off and hurting themselves...

I finally trashed that tree when I moved to Palmdale two years ago. I replaced it with a much smaller cat tree (that cost me more than twice as much as the old one did). It's since been shredded too, but Tupper and Crystal are almost always sleeping in/on it somewhere every morning when I come home from work.
I bought this one
which was the least expensive one I could find, I am sure that once the carpeting is shredded I can wrap sisal rope on it with some glue and get some more use out of it!

That's been a feature of Windows (it's not unique to FF) for the last several versions. 






