To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Look Up in Dictionary by Chris Redford
Rated 5 out of 5 stars
Works great, even faster than Safari, I think.
This is important: if you are having trouble getting it to install due to corruption errors or hash errors, you need to enable third-party cookies.
To create your own collections, you must have a Mozilla Add-ons account.