Examine source code of Ten windows and

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ten",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-003-31b6bea3c78e3a19fd889b0389652a94.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(239, 246, 247)",
      "toolbar_text": "rgb(23, 22, 22)",
      "frame": "rgb(219, 236, 249)",
      "tab_background_text": "rgb(23, 23, 26)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(21, 21, 23)",
      "tab_line": "rgb(12, 170, 188)",
      "popup": "rgb(243, 243, 247)",
      "popup_text": "rgb(17, 17, 18)",
      "tab_loading": "rgb(12, 170, 188)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6998fb06-f497-4fda-9388-af2b232b96af}"
    }
  }
}