Add-ons

Startpage (SSL) by SSL Search Bar

Startpage is a search engine that does not collect or share personally identifiable information. This search bar add-on utilizes SSL to protect searches between You and Startpage.

Collector's Note "The worlds most private search engine," is what they claim, though some would argue they are not or that it's impossible to know. Includes a free web proxy service from search results.

RequestPolicy by Justin Samuel

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

DuckDuckGo (HTML SSL) by DuckDuckGo

DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension adds DuckDuckGo (non-JS HTML version) to the search bar. For more features, see the DuckDuckGo Plus add-on. Enjoy!

Collector's Note Java free version. Very handy with NoScript.