diskort/manifest.json

{
  "manifest_version": 2,
  "name": "DisKort",
  "version": "1.0",

  "description": "Custom theme for Discord",

  "icons": {
    "48": "ext.png"
  },

  "content_scripts": [
    {
      "matches": [
        "*://discord.com/*",
        "*://discord.gg/*",
        "*://discord.gift/*"
      ],
      "css": ["btfl.css"]
    }
  ],

  "browser_specific_settings": {
    "gecko": {
      "id": "diskort@er2"
    }
  }
}