Comes with a feature removal that needed to be taken care of

Adds support for Firefox

Analysis has shown that this system doesn't actually accomplish
anything. Users do not vote on tags often enough to actually get any tag
removed, so why even bother?

Non-critical database change with this commit

Also create seperate account security options page

This commit requires a new database table

These features only have any value if users actually use them, and
experience has shown that nowhere near enough users use them to make
them worthwhile.