Bitcoin Ticker Chrome
WARNING: Don’t use the “BTC-e Bitcoin (BTC) Live Ticker” extension from the Chrome Web Store, it hijacks BTC transactions from Coinbase (maybe more?)
Maybe this is old news to most of you, but I had the "BTC-e Bitcoin (BTC) Live Ticker" Chrome extension installed and it hijacked a Bitcoin transaction that I processed using Coinbase. I've already reported it for abuse with the Google Web Store and after talking with Coinbase support they say they've known about it for a week or so and have been reporting it, but Google has yet to take it down.
This is the extension to avoid:
There are similar extensions for other cryptos, not sure if they are malicious or not but I'm avoiding those as well.