Dark by Default

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Dark by Default",
  "version": "0.4",
  "manifest_version": 2,
  "description": "Makes every page dark by default",
  "content_scripts": [
    {
      "exclude_globs": [],
      "exclude_matches": [],
      "include_globs": [
        "*"
      ],
      "js": [
        "dbd.user.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start"
    }
  ]
}