Most of the internet was already BS before 'working' LLMs, where do you think the models learned it from? I think what you want is a crap detector, and I'm with you. Any ideas good ideas and I'll donate my time to work on it.
Unfortunately, even OpenAI themselves took down their AI detection tool because it was too inaccurate. It's really, REALLY hard to detect AI writing with current technology, so any such addon would probably need to use a master list of articles that are manually flagged by human.
Suspect it would operate more on the basis of a person confirming that the article is of reasonable quality & accuracy.
So not unlike editors selecting what to publish, what to reject & what to send back for improvements.
If good articles by AI get accepted & poor articles by people get rejected, there may still be impacts, but at face value it might be sufficient for us seeking to read stuff.
I literally just saw this pop up in my Mastodon feed a few minutes ago, funny enough. I haven't used it so I can't vouch for it, but I would imagine that's something akin to what you're looking for.
Another thought: does it really matter if it's AI generated or not? As long as you can fact-check the content and the quality isn't horrible, I don't see why it matters if it's written by a real person or not
Have got fairly good at spotting these from the first few lines, but it would be nice to not bother clicking on them in the first place & better again if they didn't clog up my search results.
Back when it was just humans churning out rubbish, there was far less of it in the way of good information, but it helped enormously that search engines still respected operands.
Bringing that back would likely help far more than a detector extension.