Https everywhere

[kullatiro]

HTTPS Everywhere is a Firefox and Chrome extension that encrypts your communications with many major websites, making your browsing more secure.

https://www.eff.org/https-everywhere

Https everywhere FAQ

https://www.eff.org/https-everywhere/faq

[radicalisto]

...and it will make your browsing activity more slower, just compare it between https and regular http, you'll notice slight browsing speed decreased while using https connections.