Examine source code of Instant Highlighter

{
  "manifest_version": 2,
  "name": "Instant Highlighter",
  "version": "1.0.0",
  "description": "Highlight selected text on any page with one click. Minimal permissions, no tracking, and an options page to choose your highlight color.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c2a2b7e-7b77-4f19-9669-5f3b6d9a8cbf}",
      "strict_min_version": "91.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Instant Highlighter",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}