uBlock Origin is an open source browser extension that blocks unwanted content from web pages. In addition to advertising, this includes tracker and malware by default.
By subscribing to additional filter lists, other components of websites can be removed. In order for uBlock Origin to work optimally, no other Adblocker extensions should be installed. Otherwise the extensions could interfere with each other.
(Important: there’s a totally different add-on called simply “uBlock” which is NOT recommended.)
HTTPS Everywhere automatically enables encryption of your connection to major websites.
Decentraleyes provides popular website components locally to improve your online privacy. This avoids numerous calls to so-called “Content Delivery Networks” (CDN), that can track the usage of their files. Furthermore, it speeds up browsing.
Smart Referer makes it harder for websites to know, how you came across them. It blocks the “Referer”, a technical information about the previously visited website.