```ruby
class FirefoxAurora < Cask
  url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-aurora/firefox-26.0a2.en-US.mac.dmg'
  homepage 'http://www.mozilla.org/en-US/firefox/aurora/'
  version '26.0a2'
  sha1 '9ecf3da45382284e97762345b59dcc9c5865ea4d'
  link 'FirefoxAurora.app'
end
```

Remove aurora checksum. Useless for a nightly.
user
```ruby
class FirefoxAurora < Cask
  url 'https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-aurora/firefox-26.0a2.en-US.mac.dmg'
  homepage 'http://www.mozilla.org/en-US/firefox/aurora/'
  version '26.0a2'
  no_checksum
  link 'FirefoxAurora.app'
end
```
assistant