How to stop seeing too many ads and keep companies from following you around online. An ad blocker guide from the { -brand-name-firefox } web browser.
Sut i beidio â gweld gormod o hysbysebion chadw cwmnïau rhag eich dilyn o gwmpas ar-lein. Canllaw rhwystrydd hysbysebion gan y porwr gwe { -brand-name-firefox }.