Examine source code of 🌓 DarkBrain

{
  "name": "🌓 DarkBrain",
  "description": "Brainly Dark Theme 🌜",
  "permissions": [],
  "version": "0.1",
  "icons": {
    "128": "darklogo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://brainly.pl/*",
        "https://Znanija.com/*",
        "https://brainly.lat/*",
        "https://Brainly.com.br/*",
        "https://Nosdevoirs.fr/*",
        "https://Eodev.com/*",
        "https://brainly.ro/*",
        "https://brainly.co.id/*",
        "https://brainly.in/*",
        "https://brainly.ph/*",
        "https://brainly.com/*"
      ],
      "js": [
        "background.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_title": "DarkBrain",
    "default_icon": "darklogo.png"
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "dark.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ea6bc55b-86ba-45df-a094-9f6183941d78}"
    }
  }
}