Safari 12: get Apple to support dynamic favicons (dupe my bug report)

[shazron]

Safari 12 now supports favicons in tabs, however, we still can't dynamically change the favicon after the favicon has been loaded and cached. This is a problem if you use Gmail, Slack, Travis CI, AppVeyor and numerous other websites.

See: http://openradar.appspot.com/radar?id=4939007582535680

If you use Brisk, right click on the Dock icon, and select "Duplicate Radar" and enter 44268401 (or File -> Duplicate Radar)
If you don't have that menu option, you might have to update Brisk.

brew cask install brisk