Examine source code of SheetBookmark

{
  "manifest_version": 3,
  "name": "SheetBookmark",
  "version": "1.0.1",
  "description": "Save bookmarks from every browser into one Google Sheet in your own Drive — a tab per browser, searchable everywhere.",
  "permissions": [
    "identity",
    "bookmarks",
    "storage",
    "activeTab",
    "scripting",
    "alarms"
  ],
  "host_permissions": [
    "https://sheets.googleapis.com/*",
    "https://www.googleapis.com/*"
  ],
  "action": {
    "default_title": "Save this tab to your bookmark sheet",
    "default_popup": "ui/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "ui/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "homepage_url": "https://shuckz77.github.io/sheetbookmark/",
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmark-sheet-sync@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "bookmarksInfo",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}