ctrl+a like you've never experienced before
Normal ctrl+a is practically useless in browsers. It selects all the text on a page, including buttons and titles and anything else.
This extension remaps ctrl+a (select all) to select text around the text you have currently selected. If you haven't selected enough, you can press ctrl+a repeatedly until you've selected exactly what you want. Selected too much? ctrl+shift+a will go back to the selection before you pressed ctrl+a.