User blog comment:Dragonjet/KC3改/@comment-113.22.114.1-20150506060253/@comment-1820055-20150506074110

chrome.downloads require additional permissions.

This is for the screenshot feature where we use Chrome's download manager to trigger saving the image to your computer - a reason why the screenshots are stored under your  directory.

There's also an additional permission requested,  (this is the bottom bar when that pops up when you download something). It's disabled for 1 second each time you take a screenshot so it will not popup and get in the way of your gameplay