Also I use the extension called Shortkeys in Firefox to add a custom shortcuts for Close Other Tabs (alt+o), Close Tabs to the Right (alt+r), and Close Tabs to

Also I use the extension called Shortkeys in Firefox to add a custom shortcuts for Close Other Tabs (alt+o), Close Tabs to the Right (alt+r), and Close Tabs to the Left (alt+l). It really helps me manage browser tabs and prevents me from "tab-hoarding"!!.