Examine source code of Udemy Speedup

{
  "manifest_version": 2,
  "name": "Udemy Speedup",
  "version": "2.0.1",
  "description": "Adjust Udemy playback speed and skip \"Up Next\", intros, and outros",
  "icons": {
    "64": "imgs/logo-64.png"
  },
  "background": {
    "scripts": [
      "dist/background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.udemy.com/course/*/learn/*"
      ],
      "js": [
        "dist/content_scripts.bundle.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "64": "imgs/logo-64.png"
    }
  },
  "options_ui": {
    "page": "src/settings/settings.html"
  },
  "permissions": [
    "https://www.udemy.com/course/*/learn/*",
    "activeTab",
    "management",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a58d3bc1-10f9-46f3-bc1b-d8a727c92030}"
    }
  }
}