What I've been doing is using high audience extensions (like Tampermonkey) and getting ChatGPT to write a script for it which does what I need it to. Much more effective and trustworthy than relying on another extension developer. If Tampermonkey can't do it then I'll just write the entire extension on my own and load it as a developer extension.
The whole point is that I don't want to run other people's code on my machine so I use an LLM to generate code (that I verify) which does the job I need it to. For small, well contained requirements, it works quite well.
