Topic: free-up more screen area

Add a comment to the script page, I'm sure LouCypher watches that.
It uses Mozillazine content, so I'm sure you can use Stylish to change it.
http://userstyles.org/styles/search/mozillazine...

Topic: next page via [Page Down]

Try this: http://userscripts.org/scripts/show/3152
It doesn't do exactly what you want, but it adds the access keys that should be there in the first place.
It is a good script, if I have time I might modify it to do more.