Examine source code of EndlessVideo

{
  "applications": {
    "gecko": {
      "id": "@endlessvideo"
    }
  },
  "author": "Vitzo.com",
  "background": {
    "page": "pages/background.html"
  },
  "browser_action": {
    "default_icon": "images/icons/48x48.png",
    "default_popup": "pages/popup.html",
    "default_title": "EndlessVideo"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "styles/bootstrap.css",
        "styles/content.css",
        "styles/style.css"
      ],
      "js": [
        "scripts/content.js",
        "scripts/jquery-3.2.1.min.js",
        "scripts/endlessvideo.youtube.js",
        "scripts/endlessvideo.handler.js",
        "scripts/endlessvideo.hub.js",
        "scripts/endlessvideo.main.js"
      ],
      "matches": [
        "*://www.youtube.com/*"
      ]
    }
  ],
  "description": "Loop your favorite videos with a single click",
  "icons": {
    "16": "images/icons/16x16.png",
    "24": "images/icons/24x24.png",
    "32": "images/icons/32x32.png",
    "48": "images/icons/48x48.png"
  },
  "manifest_version": 2,
  "name": "EndlessVideo",
  "permissions": [
    "storage",
    "https://*/*",
    "http://*/*",
    "contextMenus"
  ],
  "version": "2.3resigned1",
  "web_accessible_resources": [
    "svg/*",
    "images/*"
  ]
}