Chrome on Android just ate my entire data plan

I am using Chrome on Nexus 5X.
Nothing like this happened until the last 2 days: my data plan suddenly ran out, the operator's application stated that I had no more data, and when I verified my data usage in Android Settings, I got this:

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I didn't do anything special with Chrome in the last 2 days, my occasional browsing on Facebook (without videos) has no way of reaching that amount.
Is there a way to verify within Chrome which website did this? Or is it a Chrome error?