858 [Feature] JavaScript auto-disable per-domain RFE
13023 Users must be able to disable Java and JavaScript (for JS in mail)
21923 Executing functions in "chrome:" protocol - #2.
r=mstoltz
(Checked in with red on Mac; Wan-Teh says his changes are localized so
it shouldn't interfere with his fixing bustage.)
git-svn-id: svn://10.0.0.236/trunk@57214 18797224-902f-48f8-a5cc-f745e15eee43