I'm now thinking just switching to Coin Market Cap to avoid this incredibly annoying popUP, only problem is Coin Market Cap won't let me display the token value in other currencies, only in US Dollars. I find that potentially more annoying than the Pop Up... 
Instead of staying on Chrome and switching to CMC you can start using Firefox which is a superior browser anyway so you can keep using Coingecko (superior price tracking site) without that annoying pop-up (which I never got on Firefox). Win-win situation if you ask me.