Examine source code of Recommendation Remover

{
  "manifest_version": 2,
  "name": "Recommendation Remover",
  "version": "1.0.0",
  "description": "Remove the three recommended videos at the end of a YouTube video",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content-script/recommendation-remover.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.ico",
      "48": "icons/icon48.ico",
      "128": "icons/icon128.ico"
    }
  },
  "icons": {
    "16": "icons/icon16.ico",
    "48": "icons/icon48.ico",
    "128": "icons/icon128.ico"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "recommendation-remover-extension@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}