Examine source code of lachesis

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "lachesis",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 32, 32)",
      "toolbar_text": "rgb(220, 224, 227)",
      "frame": "rgb(32, 32, 32)",
      "tab_background_text": "rgb(238, 238, 238)",
      "toolbar_field": "rgb(238, 238, 238)",
      "toolbar_field_text": "rgb(32, 32, 32)",
      "tab_line": "rgb(170, 170, 174)",
      "popup": "rgb(32, 32, 32)",
      "popup_text": "rgb(220, 224, 227)",
      "button_background_active": "rgb(170, 170, 174)",
      "button_background_hover": "rgb(170, 170, 174)",
      "icons": "rgb(220, 224, 227)",
      "popup_border": "rgb(220, 224, 227)",
      "popup_highlight": "rgb(220, 224, 227)",
      "tab_selected": "rgb(220, 224, 227)",
      "tab_text": "rgb(32, 32, 32)",
      "toolbar_field_border_focus": "rgb(220, 224, 227)",
      "toolbar_field_border": "rgb(170, 170, 174)",
      "tab_loading": "rgb(170, 170, 174)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{25b28ad1-5c0e-490f-838e-aaa6218a81e5}"
    }
  }
}