[miki123211]

We also need to take into account the biases in this data. If a given website isn't screen-reader accessible, the screen reader usage statistics are going to be very low. This shouldn't be surprising to anyone, after all, why would blind people go to a website they can't comfortably use? Some developers would probably still use that data to explain why accessibility isn't important, though.

Regardless of that, as a blind person, I'm all for a flag that lets you detect screen reader usage. I believe a good compromise here is disabling this flag in private/incognito mode.