Examine source code of DarkTube (forked)

{
  "manifest_version": 2,
  "name": "DarkTube (forked)",
  "version": "0.7.5",
  "description": "Forces YouTube to use dark theme.",
  "author": "abdullahazad",
  "homepage_url": "https://github.com/hermesthecat/DarkTube",
  "icons": {
    "48": "icons/darktube_logo.svg",
    "96": "icons/darktube_logo.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "css/darktube.css"
      ]
    }
  ],
  "permissions": [
    "cookies",
    "*://*.youtube.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fba2e394-ba01-491b-bd89-cec7d8af9136}"
    }
  }
}