[harigov]

I vouch for this claim that LinkedIn/Facebook seem to give recommendations to add someone as friend even when there is no chance that they could figure it out using data they have. I don't understand why browsers can't sandbox each tab such that there is no way to share cookies or cache. This is a serious breach of privacy if they are reading friend relationships based on your gmail open in other tabs.

[nym375]

It would not surprise me if one of their signals for recommendations is whether that party has viewed your profile.

[harigov]

That actually makes more sense.