sources:
  cbindgen-vendor.tar.xz: b180cff66e05546c967236a7abe983fff89a8b3e
  firefox-64.0.source.tar.xz: 2a484615aea59fb4b01931d49f0043de0a543aaa
  firefox-dictionary-61.0.2.tar.bz2: 25929c585dc8568a32d5be49aacc672f0ed2202f