Examine source code of Simple decent green

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simple decent green ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(241, 242, 255, 0.91)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(41, 93, 45)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(14, 164, 21)",
      "popup": "rgba(255, 255, 255, 0.97)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(27, 144, 38, 0.26)",
      "frame_inactive": "rgb(229, 230, 238)",
      "icons_attention": "rgba(4, 139, 30, 0.7)",
      "ntp_background": "rgb(247, 248, 255)",
      "popup_border": "rgb(20, 163, 38)",
      "sidebar_highlight_text": "rgb(3, 159, 24)",
      "sidebar_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(255, 255, 255)",
      "tab_loading": "rgba(0, 163, 48, 0.75)",
      "tab_text": "rgb(5, 91, 14)",
      "toolbar_bottom_separator": "rgb(33, 154, 46)",
      "toolbar_field_border": "rgb(42, 162, 42)",
      "toolbar_field_focus": "rgba(251, 255, 251, 0.94)",
      "toolbar_field_highlight": "rgb(133, 203, 118)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)",
      "toolbar_vertical_separator": "rgb(0, 167, 27)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8bf4652e-96ee-4684-b5c1-5b6136a582ad}"
    }
  }
}