Examine source code of Session Capsule

{
  "manifest_version": 3,
  "name": "Session Capsule",
  "version": "1.0",
  "description": "Save and restore tab sessions from the sidebar.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Open Session Capsule"
  },
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_icon": "icons/icon48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sessionCapsule-niteshnunia91@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}