Bug 512784 - add globally-accessible smart getters for common XPCOM services
Bug 855370 - Remove the ability to not "Always show the tab bar"
aForce
dispatchEvent
Bug 826409 - Remove onBeforeDeleteURI and onBeforeItemRemoved notifications
<em:unpack>
Bug 866880 - Implement "Close Tabs to the Right" as a built-in feature
List all tabs
Tab Context Menu