Examine source code of Focus at Work

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Focus at Work",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(29, 46, 56)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(33, 33, 33)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.15)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 100, 210, 0.7)",
      "popup": "rgba(71, 92, 104, 0.75)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgba(33, 33, 33, 0.7)",
      "popup_border": "rgba(0, 83, 174, 0.85)",
      "sidebar_border": "rgba(33, 33, 33, 0.85)",
      "sidebar_highlight_text": "rgba(255, 255, 255, 0.57)",
      "sidebar_highlight": "rgba(59, 113, 150, 0.57)",
      "sidebar_text": "rgba(198, 232, 255, 0.85)",
      "sidebar": "rgb(29, 46, 56)",
      "tab_loading": "rgba(59, 113, 150, 0.57)",
      "tab_selected": "rgba(73, 82, 142, 0.29)",
      "toolbar_field_border_focus": "rgba(0, 83, 174, 0.7)",
      "toolbar_field_border": "rgb(33, 33, 33)",
      "toolbar_field_focus": "rgba(71, 92, 104, 0.4)",
      "toolbar_field_highlight_text": "rgb(138, 154, 255)",
      "toolbar_field_highlight": "rgba(24, 41, 59, 0.7)",
      "toolbar_top_separator": "rgb(33, 33, 33)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8257eeb6-4f3a-4d0d-ab48-084d0b9cbaba}"
    }
  }
}