Latest nightly builds of Firefox 139 include an experimental web link preview feature which shows (among other things) an AI-generated summary of what that page is purportedly about before you visit it, saving you time, a click, or the need to ‘hear’ a real human voice.
If it works around paywalls, it could actually be a useful feature.
It reportedly works entirely on your machine (as it meant to be privacy preserving by default). So it will probably see only the data you can see.