Examine source code of Block New YouTube Videos

{
  "manifest_version": 2,
  "name": "Block new videos",
  "version": "1.0",
  "description": "Blocks videoes on Youtube recommended page with under 5k views.",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "./build/core.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{80ef41cf-2e65-4f4d-b047-bc1f9de95528}"
    }
  }
}