I am using Chrome on Nexus 5X. Nothing like this ever happened until the last 2 days - my data plan was depleted suddenly, the carrier's app claimed that I have no more data, and when I checked my data usage in Android Settings, I got this:
WTF? I didn't do anything special with Chrome in the last 2 days, my occasional Facebook browsing (no videos) has no way to reach that amount. Is there any way to check inside Chrome which website did this? Or is it a Chrome bug?