Examine source code of uppurleple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "uppurleple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(16, 0, 64)",
      "tab_background_text": "rgb(183, 157, 255)",
      "toolbar_field": "rgb(10, 0, 37)",
      "toolbar_field_text": "rgb(183, 157, 255)",
      "tab_line": "rgb(121, 72, 255)",
      "popup": "rgb(10, 0, 37)",
      "popup_text": "rgb(183, 157, 255)",
      "button_background_active": "rgb(121, 72, 255)",
      "button_background_hover": "rgb(80, 33, 226)",
      "frame_inactive": "rgb(10, 0, 37)",
      "icons_attention": "rgb(121, 72, 255)",
      "icons": "rgb(183, 157, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(121, 72, 255)",
      "popup_highlight_text": "rgb(121, 72, 255)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(121, 72, 255)",
      "tab_selected": "rgb(10, 0, 37)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(121, 72, 255)",
      "toolbar_field_border_focus": "rgb(255, 255, 255)",
      "toolbar_field_border": "rgb(10, 0, 37)",
      "toolbar_field_focus": "rgb(10, 0, 37)",
      "toolbar_field_highlight_text": "rgb(183, 157, 255)",
      "toolbar_field_highlight": "rgb(80, 33, 226)",
      "toolbar_field_separator": "rgb(183, 157, 255)",
      "toolbar_field_text_focus": "rgb(183, 157, 255)",
      "toolbar_top_separator": "rgb(80, 33, 226)",
      "toolbar_vertical_separator": "rgb(80, 33, 226)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1b4b8b0-0184-4fc8-9492-60ea7b590730}"
    }
  }
}