Create html document icon for Mullvad Browser
We need to create a new html document icon for Mullvad Browser. Per @pierov "We need 512x512 for macOS, and then the usual .ico sizes (16, 32, 48, 256 + 64 and 128; I don't know if 64 and 128 are required, Tor Browser has them, Firefox doesn't)". Full comment here: ticket #4