Examine source code of SmallPDF Tools v2

{
  "manifest_version": 2,
  "name": "SmallPDF Tools",
  "version": "1.0",
  "description": "Easily manage PDFs and images directly from your browser with SmallPDF Tools.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{97ed8188-9a1d-4e35-ad3c-61e13053da84}"
    }
  }
}