Examine source code of Discord Content Toggle

{
  "manifest_version": 2,
  "name": "Discord Content Toggle",
  "version": "1.1",
  "description": "Adds the ability to toggle the visibility of content in Discord chats.",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.discord.com/*"
      ],
      "js": [
        "inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0bbb348c-8388-48ee-86da-3e14e3b70118}"
    }
  }
}