Examine source code of Pop! mate

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pop!",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-011-d53e0d0d1538ed554a90e056a2f04eca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(36, 177, 189)",
      "toolbar_text": "rgb(255, 0, 0)",
      "frame": "rgb(96, 96, 96)",
      "tab_background_text": "rgb(255, 0, 0)",
      "toolbar_field": "rgb(248, 248, 248)",
      "toolbar_field_text": "rgb(255, 0, 0)",
      "tab_line": "rgb(255, 0, 0)",
      "popup": "rgb(70, 70, 70)",
      "popup_text": "rgb(255, 0, 0)",
      "button_background_hover": "rgb(240, 240, 240)",
      "icons_attention": "rgb(255, 0, 0)",
      "icons": "rgb(70, 70, 70)",
      "ntp_background": "rgb(153, 153, 153)",
      "ntp_text": "rgb(248, 248, 248)",
      "popup_border": "rgb(70, 70, 70)",
      "popup_highlight_text": "rgb(70, 70, 70)",
      "popup_highlight": "rgb(46, 212, 226)",
      "sidebar_border": "rgb(70, 70, 70)",
      "sidebar_highlight_text": "rgb(70, 70, 70)",
      "sidebar_highlight": "rgb(46, 212, 226)",
      "sidebar_text": "rgb(255, 0, 0)",
      "tab_loading": "rgb(255, 0, 0)"
    }
  }
}