Examine source code of Screenshot Annotator

{
  "manifest_version": 2,
  "name": "Screenshot Annotator",
  "version": "16",
  "description": "Capture the visible page and annotate with pen, shapes, arrows and text. Save or copy.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b9608812-c36c-4956-b2ff-dbd847e6b01f}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "96": "assets/icons/icon96.png",
      "128": "assets/icons/icon128.png"
    },
    "default_title": "Screenshot Annotator",
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "96": "assets/icons/icon96.png",
    "128": "assets/icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "web_accessible_resources": [
    "src/annotator.html"
  ]
}