Open alternatives to propietary software (X): web browsers

Any open web browser is the best option to surf in the web with security, especially since the vulnerabilities are discovered very soon and corrected right away, using a private one is like playing Russian roulette.
These are some of most well-know:

• Mozilla Firefox, one of the more used web browsers in the World. It's a powerfull and secure web browser.
• Google Chrome another open source web browser, but made by google and apparently it monitors us while we use. There are a lot of people, including myseft,  that doesn't like this circustance.
  But again the advantages of free software are evident in this case, doesn't like how this web browser works? No problem, we made a fork: Chromium... but in this case Chrome is the fork than add spy code.
• Chromium this is handled the same as google chrome but without that disturbing monitoring and works with most chrome plugins, it is also very fast and secure.
• Other less known web browsers are Midori, SeaMonkey, etc

All of them are available for Windows, Mac and GNU/Linux, in the last case we do not even have to install Firefox because it usually comes standard on all distros, for something will be.