Examine source code of GoFullPage PRO - Capture Screen

{
  "manifest_version": 3,
  "name": "GoFullPage PRO - Full Page Screen Capture",
  "short_name": "GoFullPage PRO",
  "version": "1.2.0",
  "description": "Capture a full page screenshot of your current browser window in high quality PNG, JPEG, or PDF with active clickable links.",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "gofullpage-pro@screen-captured.org",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "GoFullPage PRO - Screen Capture"
  },
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content/index.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "scripting",
    "downloads"
  ],
  "optional_permissions": [
    "tabs",
    "webNavigation"
  ],
  "host_permissions": [
    "https://www.google-analytics.com/*"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      },
      "description": "Open GoFullPage PRO Capture Menu"
    },
    "capture_full_page": {
      "suggested_key": {
        "default": "Alt+Shift+F"
      },
      "description": "Capture Full Web Page"
    },
    "capture_visible_area": {
      "suggested_key": {
        "default": "Alt+Shift+V"
      },
      "description": "Capture Visible Viewport Area"
    },
    "capture_selected_area": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "Capture Selected Webpage Area"
    }
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*",
        "assets/*",
        "src/viewer/viewer.html",
        "src/editor/editor.html",
        "src/options/options.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}