Examine source code of Show All Tabs

{
  "manifest_version": 3,
  "name": "Tab Overview Grid",
  "description": "Safari-style Show All Tabs for Firefox.",
  "version": "1.0.1",
  "action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "taboverview@example.com",
      "strict_min_version": "109.0"
    }
  },
  "data_collection_permissions": {
    "collects": "none"
  },
  "icons": {
    "16": "icons/overview-16.png",
    "32": "icons/overview-32.png",
    "128": "icons/overview-128.png"
  }
}