Examine source code of Collei

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Collei",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(22, 72, 75, 0)",
      "toolbar_text": "rgb(41, 164, 38)",
      "frame": "rgb(22, 54, 75)",
      "tab_background_text": "rgb(41, 164, 38)",
      "toolbar_field": "rgba(38, 51, 67, 0)",
      "toolbar_field_text": "rgb(57, 225, 196)",
      "tab_line": "rgb(58, 143, 146)",
      "popup": "rgb(22, 54, 75)",
      "popup_text": "rgb(25, 161, 37)",
      "tab_loading": "rgb(58, 143, 146)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b2ecf399-01a3-4c2a-a5e3-65bbc067a80c}"
    }
  }
}