Listen for DOMContentLoaded on "appcontent".
Listen for DOMContentLoaded on "appcontent".

Fixes #1344

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