Examine source code of animated pekora theme

{
  "manifest_version": 2,
  "version": "5",
  "name": "pekora",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 56, 76, 0.16)",
      "toolbar_text": "rgb(170, 208, 248)",
      "frame": "rgb(117, 141, 163)",
      "tab_background_text": "rgb(206, 240, 255)",
      "toolbar_field": "rgba(212, 234, 241, 0.5)",
      "toolbar_field_text": "rgb(144, 215, 255)",
      "tab_line": "rgb(28, 171, 176)",
      "popup": "rgba(157, 170, 183, 0.86)",
      "popup_text": "rgb(0, 0, 0)",
      "frame_inactive": "rgb(157, 170, 183)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(117, 141, 163)",
      "popup_border": "rgb(207, 227, 255)",
      "sidebar_border": "rgb(166, 223, 255)",
      "sidebar_highlight_text": "rgb(207, 227, 255)",
      "sidebar_highlight": "rgb(141, 157, 168)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(117, 141, 163)",
      "tab_background_separator": "rgb(28, 171, 176)",
      "toolbar_bottom_separator": "rgb(28, 171, 176)",
      "toolbar_field_border_focus": "rgb(166, 223, 255)",
      "toolbar_field_focus": "rgb(144, 215, 255)",
      "toolbar_field_highlight_text": "rgb(73, 80, 86)",
      "toolbar_field_highlight": "rgb(166, 223, 255)",
      "toolbar_field_separator": "rgb(28, 171, 176)",
      "toolbar_field_text_focus": "rgb(141, 157, 168)",
      "toolbar_top_separator": "rgb(28, 171, 176)",
      "toolbar_vertical_separator": "rgb(28, 171, 176)",
      "tab_loading": "rgb(28, 171, 176)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24785103-2300-478d-b1f5-c4c9f33bda25}"
    }
  }
}