Examine source code of Container Bookmarks

{
  "name": "Container Bookmarks",
  "description": "Open bookmarks in multi-account containers",
  "version": "1.4.2",
  "manifest_version": 2,
  "author": "Vance Spears",
  "homepage_url": "https://github.com/vances678/ContainerBookmarks",
  "permissions": [
    "tabs",
    "menus",
    "contextMenus",
    "bookmarks",
    "contextualIdentities",
    "cookies",
    "storage"
  ],
  "protocol_handlers": [
    {
      "protocol": "ext+cntnrbkmrk",
      "name": "Container Bookmarks",
      "uriTemplate": "/handler.html#%s"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4d1341f-2722-406d-a628-204a60159a1c}"
    }
  }
}