Examine source code of MAG Progression WF1

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "MAG Progression WF1",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(1, 10, 6)",
      "toolbar_text": "rgb(133, 83, 20)",
      "frame": "rgb(4, 23, 18)",
      "tab_background_text": "rgb(194, 213, 201)",
      "toolbar_field": "rgb(28, 48, 40)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(220, 168, 133)",
      "popup": "rgb(9, 18, 15)",
      "popup_text": "rgb(215, 239, 231)",
      "ntp_background": "rgb(21, 28, 29)",
      "ntp_text": "rgb(215, 239, 231)",
      "sidebar_border": "rgb(215, 239, 231)",
      "sidebar_highlight": "rgb(215, 239, 231)",
      "tab_loading": "rgb(220, 168, 133)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0389d07e-db5b-41c8-9e7e-cb70b3ae50ac}"
    }
  }
}