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HTTPS Everywhere is a Firefox extension produced as a collaboration between The Tor Project and the Electronic Frontier Foundation. It encrypts your communications with a number of major websites.

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 to HTTPS.
Note that some of those sites still include a lot of content from third party domains that is not available over HTTPS. As always, if the browser's lock icon is broken or carries an exclamation mark, you may remain vulnerable to some adversaries that use active attacks or traffic analysis. However, the effort that would be required to eavesdrop on your browsing should still be usefully increased.

HTTPS Everywhere can protect you only when you're using sites that support HTTPS and for which HTTPS Everywhere includes rules. If sites you use don't support HTTPS, ask the site operators to add it; only the site operator is able to enable HTTPS support on a the site. If HTTPS Everywhere doesn't include rules for a site you use, you can ask us or learn how to create them.

Answers to common questions may be on the frequently asked questions page.

You can help us test forthcoming rulesets and features by installing the development branch of the extension.