I don't have google chrome: is this an obvious feature, you know, one he would know about? he would know that it would be right there in your face when you logged in?
then I'd bet my bottom dollar that this isn't what he is thinking about or feeling. You're changing the way you react to him and he's feeling off balance.....
.....open up the computer....
....and suddenly this is not about his drinking and pot growing but about your issues, maybe playing into any abandonment issues you have, not that he directly says that to you, that would be something you could call him on, and spell out the cruelty of it. But instead leaves "evidence" in plain sight. I hope you're not buying into this, honey, it's a trap, a move in a game.