Examine source code of Kassi Share - Send to Kodi

{
  "manifest_version": 2,
  "name": "Kassi Share - Send to Kodi",
  "description": "Send videos to Kodi Media Center",
  "version": "5.4resigned1",
  "permissions": [
    "http://*/*",
    "https://*/*",
    "storage",
    "tabs",
    "contextMenus"
  ],
  "icons": {
    "16": "assets/icon_16.png",
    "48": "assets/icon_48.png",
    "128": "assets/icon_128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "assets/icon_19.png",
      "38": "assets/icon_38.png"
    },
    "default_title": "Kassi Share",
    "default_popup": "action_popup.html"
  },
  "background": {
    "scripts": [
      "js/sprintf.js",
      "js/enums.js",
      "js/shared.js",
      "js/background_scripts/context_menu.js",
      "js/background_scripts/player.js",
      "js/background_scripts/browser_action.js",
      "js/background_scripts/main.js",
      "js/background_scripts/message_handlers.js",
      "js/background_scripts/sites/abstract_site.js",
      "js/background_scripts/sites/youtube.com.js",
      "js/background_scripts/sites/vimeo.com.js",
      "js/background_scripts/sites/err.ee.js",
      "js/background_scripts/sites/twitch.tv.js",
      "js/background_scripts/sites/facebook.com.js",
      "js/background_scripts/sites/postimees.ee.js",
      "js/background_scripts/sites/crunchyroll.com.js",
      "js/background_scripts/sites/tv3play.js",
      "js/background_scripts/sites/ted.com.js",
      "js/background_scripts/sites/dailymotion.com.js",
      "js/background_scripts/sites/default.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "css/iziToast.css"
      ],
      "js": [
        "js/content_scripts/iziToast.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content_scripts/sites/default.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "js/content_scripts/sites/twitch.tv.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "js/content_scripts/sites/facebook.com.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.postimees.ee/*"
      ],
      "js": [
        "js/content_scripts/sites/postimees.ee.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.tv3play.tv3.ee/sisu/*"
      ],
      "js": [
        "js/content_scripts/sites/tv3play.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "*://*.ted.com/talks/*"
      ],
      "js": [
        "js/content_scripts/sites/ted.com.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "options_page": "settings.html",
  "short_name": "Kassi Share",
  "browser_specific_settings": {
    "gecko": {
      "id": "{71155876-36ec-4ff4-9e2d-31ea0eb3be03}"
    }
  }
}