hah is a browser extension for Chrome that is designed for people who prefer to browse the web using only their keyboard. With hah, you can click on links, select tabs, and open pages from bookmarks and history, all without touching your mouse.

The extension provides two main features: Hit a hint mode and Tab switcher mode. In Hit a hint mode, links are labeled with two-letter alphabets. Simply type the corresponding alphabet to click on the link. In Tab switcher mode, a list of currently open tabs, bookmarks, and history is displayed. You can navigate to a tab or open a URL in a new tab by selecting it from the list. The list can also be filtered based on the input text.

Please note that hah currently does not work with Gmail and Google Calendar, but the developer plans to allow users to specify excluded URLs in the future.