Can a Browser Extension look like Apple's Dynamic Island?

I've never built a browser extension, but I had an inkling of a UI idea to build something akin to https://emilkowal.ski/ui/dynamic-island that could show up in the user's top right corner and morph around.

This is probably a stupid question, but in the spirit of the Post Guidelines of "Ask anything here, and we mean anything!", is this possible?
Emil Kowalski
Emil Kowalski
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