Examine source code of Simple Search Google For

{
  "manifest_version": 2,
  "name": "Simple Search Google For",
  "version": "1.3.2",
  "description": "Add Google search to selected text context menu.",
  "author": "Aaron Papp",
  "homepage_url": "https://github.com/Aaron-P/SimpleSearchGoogleFor",
  "content_security_policy": "default-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'none'; script-src 'self'; upgrade-insecure-requests",
  "icons": {
    "24": "src/icons/icon.svg",
    "32": "src/icons/icon.svg",
    "48": "src/icons/icon.svg",
    "64": "src/icons/icon.svg",
    "96": "src/icons/icon.svg"
  },
  "permissions": [
    "browserSettings",
    "menus"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4d6e961f-cee2-45c0-bc41-fc77bde8931a}",
      "strict_min_version": "61.0"
    }
  }
}