Chrome: If you rely a lot on bookmarks, then you probably have lots of different folders and sites in your browser storing all the amazing stuff you come across. If you want to speed up this process, Bookmarx is a Chrome extension that adds a few handy keyboard shortcuts to make bookmarking a breeze.
Bookmarx defaults to Ctrl+X to load the bookmarks box (but you can change it if you need that for cutting). Everything else you do with bookmarking can be done with keyboard shortcuts, including creating folders, finding folders and flipping through currently existing folders. It's handy if you're the type that constantly bookmarks and organises the websites you come across.