Examine source code of MoonNightStars

{
  "manifest_version": 2,
  "version": "5.0",
  "name": "MoonNightStarsV5",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(10, 17, 36)",
      "toolbar_text": "rgb(255, 220, 135)",
      "frame": "rgb(27, 16, 36)",
      "tab_background_text": "rgb(255, 233, 166)",
      "toolbar_field": "rgb(20, 35, 73)",
      "toolbar_field_text": "rgb(255, 237, 191)",
      "tab_line": "rgb(255, 209, 91)",
      "popup": "rgb(16, 22, 47)",
      "popup_text": "rgb(255, 239, 175)",
      "button_background_active": "rgb(46, 62, 110)",
      "button_background_hover": "rgb(36, 53, 107)",
      "icons_attention": "rgb(255, 245, 209)",
      "icons": "rgb(255, 211, 112)",
      "ntp_background": "rgb(10, 17, 36)",
      "ntp_text": "rgb(255, 237, 191)",
      "popup_border": "rgb(42, 52, 86)",
      "popup_highlight_text": "rgb(255, 209, 91)",
      "popup_highlight": "rgb(46, 62, 110)",
      "sidebar_highlight_text": "rgb(10, 17, 36)",
      "sidebar_highlight": "rgb(255, 209, 91)",
      "sidebar_text": "rgb(255, 239, 175)",
      "sidebar": "rgb(18, 27, 51)",
      "toolbar_bottom_separator": "rgb(36, 53, 107)",
      "toolbar_top_separator": "rgb(27, 38, 64)",
      "toolbar_vertical_separator": "rgb(26, 35, 60)",
      "tab_loading": "rgb(255, 209, 91)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1a233b5-71e2-4ece-b0a5-1a0b56d1dd5a}"
    }
  }
}