Examine source code of DS Spaces Dark Mode

{
  "name": "DS Spaces Dark Mode",
  "version": "0.0.1",
  "description": "Makes DS Spaces appear in a dark theme.",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://ds-spaces.technik.fhnw.ch/*"
      ],
      "exclude_matches": [
        "*://ds-spaces.technik.fhnw.ch/wp-admin/*",
        "*://ds-spaces.technik.fhnw.ch/*/wp-admin/*"
      ],
      "css": [
        "dark.css"
      ],
      "run_at": "document_start"
    }
  ]
}