Examine source code of Emoji Censor

{
  "name": "Emoji Censor",
  "version": "1.3.0",
  "description": "Redacts all emoji characters on a page, replacing them with black boxes",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{3846e0eb-ef11-4a8a-a10c-dafe2bf317e5}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false,
    "service_worker": "background.js"
  },
  "action": {
    "default_icon": "icons/icon-32.png",
    "default_title": "Censor all emoji"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "js": [
        "emoji-censor.js",
        "emoji-censor-comms.js"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage"
  ]
}