Replying to #2 first: while I understand why that might be useful, I've declined this and similar requests in the past because I don't want people treating a foxbox as a generic browser. If this is something you want, you can of course hack that into the foxbox itself by modifying the underlying XUL, though it will be overwritten if you regenerate the foxbox later.
As far as it not obeying stop, I can't reproduce that here on my test systems. If you have a site that does this consistently, I'll look into it.
I don't think it's particularly the fault of TFFBox, the site has the same issues when I use the full TFF 7450. The site does seem to behave a lot better when I have Adblocker turned on in 7450.
I wish you could come out with a hybrid that resembles TFF 22.0, the last nimble browser Firefox came out with before they got tab-happy. Believe it or not I still use TFF 22.0 regularly, unless I'm forced to use 7450.
Anyway I don't mean to overly criticize, I really appreciate all your good work.