Examine source code of TraktToKodi

{
  "manifest_version": 2,
  "name": "TraktToKodi",
  "description": "Open/Play content with a compatible Kodi add-on from trakt.tv in your browser.",
  "version": "0.2.0.1resigned1",
  "default_locale": "en",
  "icons": {
    "16": "/images/icon_16.png",
    "48": "/images/icon_48.png",
    "128": "/images/icon_128.png"
  },
  "applications": {
    "gecko": {
      "id": "trakt2kodi@anxdpanic",
      "strict_min_version": "53.0a2"
    }
  },
  "browser_action": {
    "default_icon": {
      "19": "/images/icon_19.png",
      "38": "/images/icon_38.png"
    },
    "default_popup": "/html/settings.html",
    "browser_style": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.trakt.tv/*"
      ],
      "css": [
        "/css/trakt.css"
      ],
      "js": [
        "/js/content_script.js"
      ],
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "/html/settings.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "/js/background.js"
    ]
  },
  "permissions": [
    "*://*.trakt.tv/*",
    "tabs",
    "webNavigation",
    "activeTab",
    "storage"
  ]
}