SevenTV/Extension — reverse-engineered prompt

Build me a browser extension for 7TV style chat improvements on Twitch, Kick, and YouTube. Let users see and use extra emotes in chat, customize how chat looks, manage settings, and keep those settings synced across sites.

It should have a clean Vue based settings page or popup, load the right code depending on the site, and be able to run locally as an unpacked extension in Chrome, with a production build I can upload later. Please make the structure ready for Firefox too if reasonable.

Include a simple development setup with live reload so I can tweak the UI while I’m on Twitch or YouTube. Keep it fast and don’t break the original site chat. Look up current browser extension docs online if you need to, then implement the core pieces end to end.