Yesterday the Electronic Frontier Foundation (EFF) and the Tor Project were launched a public beta of a new Firefox extension called HTTPS Everywhere.

This Firefox extension was inspired by the launch of Google’s encrypted search option. The creators of the extension wanted a way to ensure that every search our browsers sent was encrypted.

Many sites on the web offer some limited support for encryption over HTTPS, but make it difficult to use. For instance, they may default to unencrypted HTTP, or fill encrypted pages with links that go back to the unencrypted site.

The HTTPS Everywhere extension fixes these problems by rewriting all requests to these sites (by default, automatically) to HTTPS. It encrypts most or all of the browser’s communications with some other sites:

Google Search
Wikipedia
Twitter and Identi.ca
Facebook
EFF and Tor
Ixquick, DuckDuckGo, Scroogle and other small search engines
and lots more!

Firefox users can install HTTPS Everywhere by following this link.

As always, even if you’re at an HTTPS page, remember that unless Firefox displays a colored address bar and an unbroken lock icon in the bottom-right corner, the page is not completely encrypted and you may still be vulnerable to various forms of eavesdropping or hacking (in many cases, HTTPS Everywhere can’t prevent this because sites incorporate insecure third-party content).

[Original: http://www.eff.org/deeplinks/2010/06/encrypt-web-https-everywhere-firefox-extension
https://www.eff.org/https-everywhere ]