Examine source code of KJDEv2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "KJDEv2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-030-0f935cfde055600d01a959c5c15353de.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 143, 0)",
      "toolbar_text": "rgb(27, 27, 27)",
      "frame": "rgb(27, 27, 27)",
      "tab_background_text": "rgb(255, 143, 0)",
      "toolbar_field": "rgb(27, 27, 27)",
      "toolbar_field_text": "rgb(255, 143, 0)",
      "tab_line": "rgb(255, 143, 0)",
      "popup": "rgb(27, 27, 27)",
      "popup_text": "rgb(255, 143, 0)",
      "button_background_active": "rgb(27, 27, 27)",
      "button_background_hover": "rgb(27, 27, 27)",
      "frame_inactive": "rgb(27, 27, 27)",
      "icons_attention": "rgb(27, 27, 27)",
      "icons": "rgb(27, 27, 27)",
      "ntp_background": "rgb(27, 27, 27)",
      "ntp_text": "rgb(255, 143, 0)",
      "popup_border": "rgb(255, 143, 0)",
      "popup_highlight": "rgb(255, 143, 0)",
      "sidebar_highlight_text": "rgb(255, 143, 0)",
      "sidebar_highlight": "rgb(255, 143, 0)",
      "sidebar_text": "rgb(255, 143, 0)",
      "tab_selected": "rgb(255, 143, 0)",
      "tab_text": "rgb(27, 27, 27)",
      "toolbar_bottom_separator": "rgb(255, 143, 0)",
      "toolbar_field_border_focus": "rgb(255, 143, 0)",
      "toolbar_field_text_focus": "rgb(255, 143, 0)",
      "toolbar_vertical_separator": "rgb(27, 27, 27)",
      "tab_loading": "rgb(255, 143, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a2e06aa-82b7-4676-a833-b506d4249980}"
    }
  }
}