Examine source code of Page Edge Navigate

{
  "manifest_version": 2,
  "name": "Page Edge Navigator",
  "version": "1.0",
  "description": "Jump instantly to the top or bottom of any page.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "64": "icon64.png",
      "128": "icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5abf0ed0-d3e9-474a-a304-88e89fd03df2}",
      "strict_min_version": "104.0"
    }
  }
}