Examine source code of webcricket

{
  "manifest_version": 2,
  "name": "webcricket",
  "version": "1.0",
  "description": "A Mozilla Firefox theme inspired by the sport of Cricket.",
  "author": "Code Copilot",
  "browser_specific_settings": {
    "gecko": {
      "id": "webcricket@codecopilot.dev"
    }
  },
  "theme": {
    "images": {
      "theme_frame": "images/cricket_background.png"
    },
    "colors": {
      "frame": "#005c1f",
      "tab_background_text": "#ffffff",
      "toolbar": "#006b2f",
      "toolbar_text": "#ffffff",
      "tab_line": "#ffd700",
      "popup": "#ffffff",
      "popup_text": "#000000"
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    }
  }
}