minor fix

* update comment
* update alignment
fix wrong unescaping
fx28: remove TODO comment

* [Session Restore] Remove synchronous start up fallback
  https://bugzilla.mozilla.org/show_bug.cgi?id=918024
fx28: refactor TAB key handling

* Implement DOM3 KeyboardEvent.repeat
  https://bugzilla.mozilla.org/show_bug.cgi?id=600117