Examine source code of AWSM Container Opener

{
  "manifest_version": 3,
  "name": "AWSM Container Opener",
  "short_name": "AWSM Containers",
  "version": "1.0.0",
  "description": "Opens URLs inside Firefox Multi-Account Containers via the ext+container: protocol. Built and maintained as part of the awsm project.",
  "homepage_url": "https://github.com/AleG03/awsm-firefox-container",
  "author": "awsm contributors",
  "browser_specific_settings": {
    "gecko": {
      "id": "awsm-container@awsm.io",
      "strict_min_version": "91.0"
    }
  },
  "default_locale": "en",
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  },
  "permissions": [
    "contextualIdentities",
    "cookies",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "protocol_handlers": [
    {
      "protocol": "ext+container",
      "name": "AWSM Container Opener",
      "uriTemplate": "handler.html?u=%s"
    }
  ]
}