Rated 5 out of 5 stars
I just found out why "Scroll to Top/Bottom" don't work.
You have to UNCHECK "always use cursor keys to navigate with page" in Firefox options.
Bloody messy, isn't it?
This issue has been around for quite a while Rated 4 out of 5 stars
quote "Version 1.6.8 Released February 9, 2012 87.0 KB Works with Firefox 4.0 - 12.*
x Fixed bug: 'Scroll to Top', 'Scroll to Bottom', 'Page Up', 'Page Down' commands sometimes don't work."
OK, You've got me. 'Scroll to Top', 'Scroll to Bottom' -- These still don't work, even in this page itself!