Examine source code of forestbones ninjai

{
  "manifest_version": 2,
  "name": "forestbones ninjai",
  "author": "sheimer",
  "version": "1.3",
  "theme": {
    "images": {
      "theme_frame": "bg.png"
    },
    "colors": {
      "tab_background_text": "hsl(67, 26%, 88%)",
      "tab_text": "hsl(67, 26%, 88%)",
      "tab_selected": "hsl(233, 18%, 29%)",
      "tab_line": "transparent",
      "tab_loading": "hsl(179, 44%, 86%)",
      "frame": "hsl(233, 18%, 15%)",
      "popup": "hsl(233, 18%, 21%)",
      "popup_text": "hsl(67, 26%, 88%)",
      "popup_border": "hsl(179, 10%, 35%)",
      "popup_highlight": "hsla(170, 18%, 50%, 0.42)",
      "popup_highlight_text": "hsl(67, 26%, 88%)",
      "toolbar": "hsl(233, 18%, 15%)",
      "toolbar_text": "hsl(67, 26%, 88%)",
      "toolbar_field": "hsl(233, 18%, 21%)",
      "toolbar_field_text": "hsl(67, 26%, 88%)",
      "toolbar_field_focus": "hsl(233, 18%, 21%)",
      "toolbar_field_border_focus": "hsla(179, 51%, 72%, 0.7)",
      "toolbar_top_separator": "transparent",
      "toolbar_bottom_separator": "hsl(233, 27%, 21%)",
      "ntp_background": "hsl(150, 2%, 20%)",
      "ntp_card_background": "hsl(140, 2%, 28%)",
      "ntp_text": "hsl(67, 26%, 88%)",
      "sidebar": "hsl(233, 18%, 15%)",
      "sidebar_text": "hsl(67, 26%, 88%)",
      "sidebar_highlight": "hsla(105, 18%, 50%, 0.42)",
      "icons_attention": "hsl(146, 44%, 86%)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8af7ffe8-c401-4008-b8c2-d27677bcfdf1}"
    }
  }
}