EFF’s PanoptiClick 3.0
Brought to you by Electronic Frontier Foundation, Panopticlick 3.0 “Is your browser safe against tracking?” is a webpage that checks how private your browsing is. This is somewhat tied in to Privacy Badger, which is EFF’s (free) tracking blocker. Another EFF project is HTTPS Everywhere.
While you’re at it, you might want to run Your Social Media Fingerprint, which indicates if you appear to be logged in to various platforms.
Panopticlick 3.0 was released 12 months ago, and has been mentioned on AskWoody over the last couple of years. Martin Brinkmann published on it on ghacks.net in 2013. Another utility option mentioned here is https://browserleaks.com/
