Examine source code of Terminal Blue

{
  "manifest_version": 2,
  "name": "Terminal Blue",
  "version": "1.2resigned1",
  "description": "A #233354 theme.",
  "author": "Jovan Lanik",
  "homepage_url": "https://github.com/JovanLanik",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "theme"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "terminal@blue.theme",
      "strict_min_version": "60.0"
    }
  }
}