If you are like me, you avoid using your mouse. So here are a few shortcuts in Firefox I have recently discovered which have lessened my dependence on it.
| Ctrl + L | Select location bar |
| Ctrl + K | Focus web search |
| Ctrl + Shift + T | Undo close tab |
| Ctrl + [Shift + ] Tab | Tab forward/backward through tabs |
| Alt + Left/Right arrow | Backward/Forward |
Alt + Left arrow actually goes back in Ubuntu! Another one of my favorite shortcuts is Ctrl + D + Enter. Try it!