Examine source code of Smart Highlighter

{
  "manifest_version": 2,
  "name": "Smart Highlighter",
  "version": "1.0.0",
  "description": "Highlight your saved keywords on any page with one click.",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-highlighter@example.com",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Smart Highlighter",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}