Examine source code of CaelestiaFox

{
  "manifest_version": 2,
  "name": "CaelestiaFox",
  "version": "2.0",
  "description": "A Firefox theme for the Caelestia dotfiles.",
  "browser_specific_settings": {
    "gecko": {
      "id": "caelestiafox@caelestia.org"
    }
  },
  "background": {
    "scripts": [
      "dist/extension.js"
    ]
  },
  "permissions": [
    "nativeMessaging",
    "theme"
  ]
}