Examine source code of Dark Theme Chroma

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "100.0",
      "id": "{6ed8b2b4-b830-45f6-8472-7eb2dd3f6102}"
    }
  },
  "description": "Clean dark theme with chroma RGB lighting",
  "developer": {
    "name": "VoidTwo",
    "url": "https://github.com/VoidTwo/Dark-Theme-Chroma-Firefox"
  },
  "icons": {
    "16": "icons/icon_16x16.png",
    "32": "icons/icon_32x32.png",
    "48": "icons/icon_48x48.png",
    "64": "icons/icon_64x64.png",
    "96": "icons/icon_96x96.png",
    "128": "icons/icon_128x128.png"
  },
  "manifest_version": 2,
  "name": "Dark Theme Chroma",
  "permissions": [
    "alarms",
    "theme"
  ],
  "short_name": "Dark Chroma",
  "version": "1.4"
}