To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Rated 5 out of 5 stars
I would've given it 10 stars if possible. The only addon that nearly every one of my FF installation has (besides my own addons that is).
I do feel that it does slow down page loading a little bit - quite understandable though and a tiny price to pay for a much nicer browsing experience than without it.