HTTPS Everywhere

Quoting from an e-mail I received:

"This week, EFF launched a new version of HTTPS Everywhere, a free security tool that provides enhanced privacy protection for Firefox browser users. EFF built HTTPS Everywhere to automatically switch many of the websites you visit from insecure HTTP to secure HTTPS.

EFF and the Tor Project originally built the HTTPS Everywhere software to help users take advantage of secure web searching on Google and a few other sites. Browsers normally prefer HTTP, unless site operators explicitly redirect browsers to HTTPS. HTTPS Everywhere changes the browser to prefer HTTPS wherever it's known to work.

After researchers demonstrated major web security flaws on social networking sites, webmail and search engines, EFF was inspired to expand HTTPS Everywhere to include Facebook, Twitter, Hotmail, Bit.ly, Cisco, Dropbox, Evernote, and GitHub. In addition to making HTTPS Everywhere open-source and available for free, EFF has released a technical guide to help website operators implement HTTPS properly, which will improve security and privacy across the web."