PixelCat – Get this Extension for 🦊 Firefox (en-US)
addons.mozilla.org
Download PixelCat for Firefox. A playful pixel pet add-on for YouTube and Google. Choose a cat or fox, earn XP, complete quests, unlock skins, use companions, and enjoy fun page interactions.

A fun pixel cat that roams around your YouTube screen with 10 unique animations idle, walking, running, jumping, attacking, grooming, sleeping, and more!