I added something similar into my feed reader. Even summarizes comments. The problem is paywalls, sites that heavily use Javascript, and other bot protection me

I added something similar into my feed reader. Even summarizes comments. The problem is paywalls, sites that heavily use Javascript, and other bot protection measures (such as OpenAI's blog which I found a little bit ironic). But I guess you might be able to get around bot protections and JS if it's a browser extension.