Examine source code of ProtonFoxy

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "ProtonFoxy",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-008-60d2718f8c915b5ba09f31df5555b459.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 37, 43)",
      "toolbar_text": "rgb(225, 234, 239)",
      "frame": "rgb(31, 33, 35)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(52, 67, 83)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(94, 109, 194)",
      "popup": "rgb(52, 67, 83)",
      "popup_text": "rgb(255, 255, 255)",
      "icons": "rgb(225, 234, 239)",
      "ntp_background": "rgb(31, 33, 35)",
      "ntp_text": "rgb(225, 234, 239)",
      "sidebar_border": "rgb(225, 234, 239)",
      "sidebar_text": "rgb(225, 234, 239)",
      "sidebar": "rgb(36, 48, 57)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(94, 109, 194)",
      "toolbar_field_separator": "rgb(96, 117, 121)",
      "tab_loading": "rgb(94, 109, 194)"
    }
  }
}