Yeah, I think personally LLMs are fine for like writing a single function, or to rubber duck with for debugging or thinking through some details of your implementation, but I’d never use one to write a whole file or project. They have their uses, and I do occasionally use something like ollama to talk through a problem and get some code snippets as a starting point for something. Trying to do too much more than that is asking for problems though. It makes it way harder to debug because it becomes reading code you haven’t written, it can make the code style inconsistent, and a non-insignifigant amount of the time even in short code segments it will hallucinate a non existent function or implement something incorrectly, so using it to write massive amounts of code makes that way more likely.
It does work with Firefox plugins, there just isn’t a button to open the extension “store” in the extensions settings page like stock Firefox has. You can add them by manually going to the url though, it’s just recommended that you don’t since that increases your risk of adding a malicious plugin or being fingerprinted, etc. I still added a few plugins that I really dislike not having though, like a password manager and darkreader, just because I valued the convenience slightly more than the added security.