Originally I had disabled this feature on some claims that, in Chrome, the way it works is by submitting a hashed version of the URLs you visit to Google to check if they are malicious. However, I then stumbled across this: https://developers.google.com/safe-browsing/developers_guide_v3#Audience It appears that while everything is hashed, lists are still downloaded and checked locally. So to me it seems like using Google Safebrowsing from a privacy perspective is perfectly fine. I'm not sure how the idea that URLs were sent to Google came around (maybe because other companies do that?). Have others disabled this feature due to this false information? It looks like I'll be re-enabling it.