Examine source code of Full Page Screenshot Tool

{
  "manifest_version": 2,
  "name": "Full Page Screenshot",
  "version": "1.4.1",
  "description": "Capture an entire scrollable web page as a single PNG or JPEG image. Scrolls and stitches the page automatically, handles high-DPI displays, and can also grab just the visible area.",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5364978-6e97-45ac-951b-82f71290aa6b}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_title": "Full Page Screenshot",
    "default_popup": "src/popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    }
  }
}