Bug 809056 - Reduce thumbnailing impact by capturing and storing only top sites. r=markh
Bug 945438 - Set event.cancelable for mousedown correctly on Metro [r=jimm]
Bug 957490 - Fix initialization of MouseEvent.buttons on Metro [r=jimm]
Bug 952297 - Don't force scroll arrows to be visible in tab strip [r=sfoster]
Backed out changeset f552ce04bc36 (bug 809056) for m-bc orange
merge fx-team to mozilla-central