I’m a big fan of shortcuts. Sometimes you discover one by accident. OK, I could read through the Mozilla Help file and try and memorize a whole batch of them … but does anybody do that?
I stumbled across CTRL+E by accident. In Firefox, if you press this combination (or CTRL+K), your cursor focus shifts to the Search box at the top, next to the address bar (Google in my case). If text is in there, it is highlighted – so you’re ready to type in your query.
Because I discovered this accidentally, and was so delighted, I’m much more likely to remember it now. 
And as to another very useful (indispensable) shortcut: CTRL+W will close your current tab.
It must be easily 100 times a day I use that one.
