Thanks! The hard part was actually understand Chrome extension's lifecycle and communication between the content script, popup, and service worker. What I initially thought was going to be hard, ended up being actually quite easy (cf socket.io).
Good luck if you ever attempt to build it :)
I can imagine, browser extensions are a pain in the butt. Are you planning to open source the code? Did you build everything by yourself or on top of https://liveblocks.io/?
I was planning on open-sourcing the extension itself, but not the backend for now because of some secrets. But ultimately, my goal is to create a blog post to create a minimal yet functional Chrome extension connected to a backend with socket.io.
And didn't knew this service existed, so created everything myself so far.
Awesome! Like others mentioned here, content moderation plus security is key. Wish you the best of luck!