Typeracer Companion par Utilisateur ou utilisatrice 13274976 de Firefox

Adds various functionalities to Typeracer.com. This extension:

- Hides most of the ads that appear around the page border
- Allows you to automatically enter races without clicking "Race Again"
- When you click "Try Again" on a quote, highlights all the mistakes you made last time so you know where you need practice
- Stops the space bar and backspace key from messing up races (by scrolling or navigating back)
- Adds a menu to access various "universes" (different versions of the site with special rules)