Examine source code of Outube

{
  "manifest_version": 2,
  "name": "Outube",
  "version": "1.0",
  "description": "Automatically opens YouTube videos on YewTube (Invidious instance). A more privacy focused and ethically designed front-end for YouTube.",
  "icons": {
    "48": "icons/outube-48.png",
    "96": "icons/outube-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtu.be/*"
      ],
      "run_at": "document_start",
      "js": [
        "main.js"
      ]
    }
  ]
}