Examine source code of Rendered HTML Saver

{
  "manifest_version": 2,
  "name": "Rendered HTML Saver",
  "version": "1.0.2",
  "description": "Save the active tab's current rendered DOM as an HTML file.",
  "icons": {
    "32": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "permissions": [
    "activeTab",
    "downloads"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icon.svg",
      "48": "icon.svg",
      "96": "icon.svg"
    },
    "default_title": "Save rendered HTML"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rendered-html-saver@local.deriklogov",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}