Ensure that the update AND download URL are allowed.
Ensure that the update AND download URL are allowed.

Fixes #1485

HasClass0/greasemonkey,Ventero/greasemonkey,the8472/greasemonkey,the8472/greasemonkey,Martii/greasemonkey,Martii/greasemonkey,Ventero/greasemonkey,HasClass0/greasemonkey