On Yosemite Safari opens randomly, why? and how can I stop it? On Yosemite, I don't use Safari at all. Never.
Every now and then (like once a week or so), Safari automatically opens, without my interaction and it does not even come to forefront, it just remains in the background, and I notice it when I go to the dock to open something else and notice it is there.
It appears to just want to connect to apple home page (no suspicious tabs or anything that I can see).   

Anyone has any suggestions?
I was having the same problem, about twice a day. I installed Little Snitch to see what servers were involved, and I noticed a Dashlane server was one of them. I disabled the Dashlane extension in Safari and it hasn't happened for the last 24 hours.