Examine source code of Dimitri (Fire Emblem)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dimitri (Fire Emblem) FIXED",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 53, 169)",
      "toolbar_text": "rgb(255, 255, 233)",
      "frame": "rgb(35, 44, 53)",
      "tab_background_text": "rgb(255, 255, 233)",
      "toolbar_field": "rgb(255, 255, 233)",
      "toolbar_field_text": "rgb(77, 108, 226)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(255, 255, 233)",
      "popup_text": "rgb(0, 0, 0)",
      "icons_attention": "rgb(255, 255, 233)",
      "icons": "rgb(255, 255, 233)",
      "ntp_text": "rgb(255, 255, 233)",
      "popup_highlight_text": "rgb(255, 255, 233)",
      "sidebar_highlight_text": "rgb(255, 255, 233)",
      "sidebar_text": "rgb(255, 255, 233)",
      "tab_text": "rgb(255, 255, 233)",
      "toolbar_field_highlight_text": "rgb(255, 255, 233)",
      "toolbar_field_text_focus": "rgb(255, 255, 233)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1880e6cd-e1bb-429a-9fa5-68cf52f65b9d}"
    }
  }
}