Examine source code of BookmarkSpeeDial

{
  "manifest_version": 2,
  "name": "BookmarSpeeDial",
  "version": "1.0",
  "description": "Create a Speed Dial from the Bookmarks",
  "icons": {
    "48": "icons/BookmarSpeeDial48.png"
  },
  "chrome_url_overrides": {
    "newtab": "./index.html"
  },
  "permissions": [
    "bookmarks"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "BookmarSpeeDial@srjuggernaut.dev"
    }
  }
}