Examine source code of Handlane

{
  "manifest_version": 3,
  "name": "Handlane",
  "description": "Share files between nearby devices through a temporary WebRTC session.",
  "version": "0.2.6",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Handlane",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "host_permissions": [
    "https://api.handlane.com/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; img-src 'self' data: blob:; connect-src 'self' https://api.handlane.com wss://api.handlane.com;"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "handlane-addon@handlane.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}