Examine source code of YouTube No Suggestions

{
  "manifest_version": 2,
  "name": "YouTube No Suggestions",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-no-suggestions@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Hides YouTube recommendations on the homepage and video pages. Reveal them with a button click.",
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "tree.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ]
}