cask 'thunderbird-beta' do version '42.0b2' sha256 '98081c29a30ffbe77de900de1149fba018bffb1134f7e70bfb96367cfbeec276' url "https://download.mozilla.org/?product=thunderbird-#{version}&os=osx&lang=en-US" name 'Mozilla Thunderbird' homepage 'https://www.mozilla.org/en-US/thunderbird/all-beta.html' license :mpl app 'Thunderbird.app' end