There's no need to set anon boxes reset properties to their defaults.
Also, there's no need to use !important, since they have no other rules. There's
::-moz-pagecontent which is tricky, because it can be affected by @page rules,
but only margin properties are allowed on those.
MozReview-Commit-ID: Gtl9jTLYyXA
--HG--
extra : rebase_source : c151a61f112a7e2fe402663bb32e76514ddb69c9