12 best Firefox security and privacy add-ons in 2021 (free)
Best Firefox add-ons to secure browsing, block ads and trackers, clean cookies, change your IP, encrypt your data and manage your passwords.
uBlock Origin
uBlock Origin is a free and open-source, cross-platform browser extension for content-filtering, including ad-blocking. The extension is available for several browsers: Chrome, Chromium, Edge, Firefox, Opera…
More info: https://ublockorigin.com
How to block YouTube ads ?
How to block ad sessions tracking and interrupting your videos on Youtube ? List of the best browser add-ons to block Youtube ads.