HTTPS Everywhere is a free and open-source browser extension for Google Chrome, Microsoft Edge, Mozilla Firefox, Opera, Brave, Vivaldi and Firefox for Android, which is developed collaboratively by the Electronic Frontier Foundation (EFF) and the Tor Project. It automatically makes websites use a more secure HTTPS connection instead of HTTP, if they support it. The option “Encrypt All Sites Eligible” makes it possible to block and unblock all non-HTTPS browser connections with one click. HTTPS Everywhere was inspired by Google’s increased use of HTTPS and is designed to force the usage of HTTPS automatically whenever possible. The code, in part, is based on No Script’s HTTP Strict Transport Security implementation, but HTTPS Everywhere is intended to be simpler to use than No Script’s force HTTPS functionality which requires the user to manually add websites to a list. The EFF provides information for users on how to add HTTPS rulesets to HTTPS Everywhere, and information on which websites support HTTPS.