Examine source code of Quick Link Highlighter

{
  "manifest_version": 2,
  "name": "Quick Link Highlighter",
  "version": "1.0.0",
  "description": "One‑click toggle to highlight links and buttons on the current tab. Choose your color in Options.",
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-link-highlighter@example.com",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Toggle link highlight",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "activeTab",
    "storage"
  ]
}