Examine source code of infinitum

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "infinito",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(26, 22, 22)",
      "toolbar_text": "rgb(254, 254, 254)",
      "frame": "rgb(26, 22, 22)",
      "tab_background_text": "rgb(254, 254, 254)",
      "toolbar_field": "rgb(30, 40, 49)",
      "toolbar_field_text": "rgb(255, 246, 246)",
      "tab_line": "rgb(4, 142, 253)",
      "popup": "rgb(34, 37, 38)",
      "popup_text": "rgb(255, 246, 246)",
      "button_background_hover": "rgba(116, 187, 243, 0.53)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "popup_border": "rgb(4, 142, 253)",
      "tab_selected": "rgba(116, 187, 243, 0.53)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgba(116, 187, 243, 0.53)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(4, 142, 253)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ba95dfb-6de4-43c1-9576-10890ae73f59}"
    }
  }
}