Backed out 4 changesets (bug 436089) for test failures.
Bug 824150 - Code cleanup in /editor/: Use new String methods like startsWith, endsWith, contains, remaining Services.jsm switches and querySelector use instead of NodeList calls: about:support. r=florian
Bug 824150 - Code cleanup in /editor/: Use new String methods like startsWith, endsWith, contains, remaining Services.jsm switches and querySelector use instead of NodeList calls: activity manager. r=bwinton
Bug 834020 - Remove use of nsIEnumerator in mailnews C++ code. r=Neil