sources:
  cbindgen-vendor.tar.xz: 7efa6255e73d8e3c9dc674822d2e29ebc0e3391b
  firefox-66.0.3.source.tar.xz: 531b26c12a3c838bd5539e6f3497ae57206c7534
  firefox-dictionary-61.0.2.tar.bz2: 25929c585dc8568a32d5be49aacc672f0ed2202f