sources:
  cbindgen-vendor.tar.xz: 7efa6255e73d8e3c9dc674822d2e29ebc0e3391b
  firefox-66.0.1.source.tar.xz: 76ce815732bbfbdbee8f58e946c5217c58ef7af3
  firefox-dictionary-61.0.2.tar.bz2: 25929c585dc8568a32d5be49aacc672f0ed2202f