"[The browser] tracks how long someone spends on a website as a measure of how useful the information is likely to be, and then can match that to an existing ca

"[The browser] tracks how long someone spends on a website as a measure of how useful the information is likely to be, and then can match that to an existing card to store relevant information." This is probably a simplification of how it works, but taking this description at its word, Beam will just start assigning outsize relevance to sticky high-engagement sites like Youtube and Twitter. Hope it's more impressive than that!