Wouldn't it be easier and/or faster to create a userscript? I've "vibe coded" tens myself, but never really saw the use case for making a full extension out of any of them. Genuinly curious what you made.

I allegedly know someone who allegedly uses a pirating site for watching the NFL. The site has every kind of clickjacking and malwarey trick. The extension makes only the correct buttons work, the volume controls the volume, the full screen button controls the screen size etc.

Another one (I've open sourced, you can check it out here https://github.com/luvchurchill/mani-gpg) A site I use (manifold.markets) announced they are getting rid of DMs due to spam (they've since brought it back) so I made an extension which makes it easy to use pgp & age encryption on the site so we can do pseudo DMs. It injects "Decrypt" buttons next to exncrypted text etc etc. You can see screenshots at https://manifold.markets/post/an-extension-to-assist-with-so...

(Look at the comments for the latest look)

Besides for that, there are a few I'm sure can be scripts