Examine source code of Page Performance Insights

{
  "manifest_version": 2,
  "name": "Page Performance Insights",
  "version": "1.0.0",
  "description": "Analyze and display webpage performance metrics including load times, resource counts, and optimization suggestions in a convenient sidebar panel.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_title": "Performance Insights"
  },
  "browser_action": {
    "default_title": "Toggle Performance Insights",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "web_accessible_resources": [
    "sidebar.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{658193db-193c-48ae-99c2-b5bed6445517}"
    }
  }
}