Examine source code of Discord Theme for Firefox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Discord Theme for Firefox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(35, 39, 42)",
      "toolbar_text": "rgb(88, 101, 242)",
      "frame": "rgb(115, 128, 248)",
      "tab_background_text": "rgb(44, 47, 51)",
      "toolbar_field": "rgb(44, 47, 51)",
      "toolbar_field_text": "rgb(88, 101, 242)",
      "tab_line": "rgb(88, 101, 242)",
      "popup": "rgb(35, 39, 42)",
      "popup_text": "rgb(88, 101, 242)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgb(220, 20, 60)",
      "ntp_background": "rgb(35, 39, 42)",
      "popup_border": "rgb(35, 39, 42)",
      "popup_highlight": "rgb(88, 101, 242)",
      "tab_loading": "rgb(88, 101, 242)",
      "toolbar_bottom_separator": "rgb(35, 39, 42)"
    }
  }
}