Examine source code of Yahoo JP Fix

{
  "manifest_version": 2,
  "name": "Yahoo JP Fix",
  "version": "1.0",
  "description": "Add Yahoo JP as a search engine.",
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yahoo-jp-fix@example.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "search"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Yahoo JP",
      "search_url": "https://search.yahoo.co.jp/search?q={searchTerms}",
      "favicon_url": "https://www.yahoo.co.jp/favicon.ico"
    }
  }
}