Examine source code of Discord Compact

{
  "manifest_version": 2,
  "name": "Discord Compact",
  "version": "1.0",
  "description": "Tool to remove discord sidebar",
  "browser_specific_settings": {
    "gecko": {
      "id": "discord-compact@doublenom.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://discord.com/*"
      ],
      "js": [
        "compactify.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "toggle-compact": {
      "suggested_key": {
        "default": "Ctrl+F12"
      }
    }
  }
}