HTTPS Everywhere is a Firefox add-on that's perfect for users who want to maximize their security while surfing the web.
Basically, HTTPS Everywhere works by activating HTTPS on a selection of common websites, in other words, the "safe mode" instead of the more usual HTTP. This encrypts your information, making it difficult, if not impossible, to monitor your browsing.
Currently, HTTPS Everywhere works on Google Search, Wikipedia, Twitter, Facebook, most of Amazon, GMX, Wordpress.com blogs, The New York Times, The Washington Post, Paypal, EFF, Tor, and Ixquick. If you are technically oriented, however, you can write your own ruleset, so there's no need to be limited to the default sites. Additionally, you can enable or disable HTTPS Everywhere for individual sites under Tools > Add-ons > Options.
HTTPS Everywhere is a no-effort way to increase security on the web.
Download HTTPS Everywhere 0.1.2 in Softonic