Examine source code of IBM Devfox

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "IBM Dev",
  "homepage_url": "https://github.com/agostaxyz/ibm-firefox-theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "rebus.png",
        "ibm.png",
        "noise.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top",
        "right top",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(62, 102, 182)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(20, 54, 123)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(20, 54, 123)",
      "popup_text": "rgb(215, 226, 239)",
      "ntp_background": "rgb(79, 89, 105)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(255, 255, 255)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_loading": "rgb(62, 102, 182)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(82, 82, 82)",
      "toolbar_field_border": "rgb(255, 255, 255)",
      "toolbar_field_focus": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_text_focus": "rgba(0, 0, 0, 0.96)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a021491e-accf-471d-8411-f1883314a461}"
    }
  }
}