Examine source code of Pin Sheets on top

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "version": "1.1.6",
  "manifest_version": 3,
  "short_name": "__MSG_appShortName__",
  "default_locale": "en",
  "author": "Kazuki Yamada",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "minimum_chrome_version": "88.0",
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/spreadsheets/*"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{182f1e91-28db-4ec8-b9c5-65f630258168}",
      "strict_min_version": "112.0"
    }
  }
}