Examine source code of Page Source HTML Viewer (works on Android)

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manifest.json

{
  "manifest_version": 3,
  "name": "Page Source HTML Viewer",
  "version": "1.17",
  "description": "Professional source viewer with line numbers, syntax highlighting, and SEO & tech analysis.",
  "icons": {
    "48": "icon-48.png",
    "96": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "source-viewer-mobile@2026.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "contextMenus",
    "menus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "View Source",
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon.png"
    }
  }
}