Add-ons are small apps you can add to %S that do lots of things — from managing to-do lists, to downloading videos, to changing the look of your browser.
Mae ychwanegion yn apiau bach y gallwch eu hychwanegu i %S sy'n gwneud lot o bethau — o reoli eich rhestrau gwneud pethau, llwytho fideos i lawr, newid golwg eich porwr.