```ruby
cask :v1 => 'earlybird' do
  version '42.0a2'
  sha256 :no_check  # required as upstream package is updated in-placea

  url "https://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-earlybird/thunderbird-#{version}.en-US.mac.dmg"
  name 'Earlybird'
  name 'Thunderbird Nightly'
  homepage 'https://www.mozilla.org/en-US/thunderbird/channel/'
  license :mpl

  app 'Earlybird.app'
end
```

Add tags stanza to Earlybird
user
```ruby
cask :v1 => 'earlybird' do
  version '42.0a2'
  sha256 :no_check  # required as upstream package is updated in-placea

  url "https://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-earlybird/thunderbird-#{version}.en-US.mac.dmg"
  name 'Earlybird'
  name 'Thunderbird Nightly'
  homepage 'https://www.mozilla.org/en-US/thunderbird/channel/'
  license :mpl
  tags :vendor => 'Mozilla'

  app 'Earlybird.app'
end
```
assistant