Don't really think it's the w10 updates or drivers (I have them disabled, i turn them on manually occasionally because otherwise they suck up my bandwidth at inopportune times). However it might be a firefox update. I noticed it seemed to happen when I typed a url into firefox, i turned off hardware acceleration in firefox and haven't had a crash with the new version yet. It's only been a couple hours though, so It's too early for me to be sure.
Edit: I've been streaming for a week since posting this and the crashing is completely gone. Definitely going to peg this as some kind of conflict between obs and firefox' hardware optimizations.