Here is what Firefox says about itself:

The 100% fresh, free-range, ethical browser

More speed

Bring it, Internet! We’ve spent the last year supercharging Firefox’s performance. Now start up faster, tab hop quicker and scroll like a speed demon.

More privacy

Firefox doesn’t sell access to your personal information like other companies. From privacy tools to tracking protection, you’re in charge of who sees what.

More freedom

Following the pack isn’t our style. As part of the non-profit Mozilla, Firefox leads the fight to protect your online rights and champion an Internet that benefits everyone — not just a few.

Go to the Firefox listing.