Examine source code of Brisket

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Brisket",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(22, 22, 22)",
      "toolbar_text": "rgb(205, 149, 12)",
      "frame": "rgb(22, 22, 22)",
      "tab_background_text": "rgb(205, 149, 12)",
      "toolbar_field": "rgb(22, 22, 22)",
      "toolbar_field_text": "rgb(205, 149, 12)",
      "tab_line": "rgb(63, 185, 69)",
      "popup": "rgb(22, 22, 22)",
      "popup_text": "rgb(205, 149, 12)",
      "icons_attention": "rgb(185, 34, 41)",
      "ntp_background": "rgb(22, 22, 22)",
      "popup_border": "rgba(153, 90, 148, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(185, 34, 41)",
      "sidebar_border": "rgb(22, 22, 22)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(185, 34, 41)",
      "sidebar_text": "rgb(205, 149, 12)",
      "sidebar": "rgb(22, 22, 22)",
      "tab_selected": "rgb(22, 22, 22)",
      "tab_text": "rgb(63, 185, 69)",
      "toolbar_bottom_separator": "rgba(220, 18, 255, 0)",
      "toolbar_field_border_focus": "rgb(63, 185, 69)",
      "toolbar_field_border": "rgba(220, 18, 255, 0)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(21, 147, 28)",
      "toolbar_field_separator": "rgba(21, 147, 28, 0)",
      "toolbar_top_separator": "rgba(205, 149, 12, 0)",
      "toolbar_vertical_separator": "rgba(39, 112, 43, 0)",
      "tab_loading": "rgb(63, 185, 69)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4095aed-d1ff-4587-8426-8496fc6df666}"
    }
  }
}