Examine source code of Black Pixel

{
  "manifest_version": 2,
  "version": "6.0",
  "name": "Black Pixel",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "button_background_active": "rgba(26, 115, 232, 0.33)",
      "frame": "rgb(0, 0, 0)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgb(26, 115, 232)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup": "rgb(33, 33, 33)",
      "popup_border": "rgba(0, 0, 0, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(26, 115, 232, 0.33)",
      "popup_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgba(0, 0, 0, 0)",
      "sidebar_highlight_text": "rgb(26, 115, 232)",
      "sidebar_highlight": "rgba(0, 0, 0, 0)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_background_separator": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgb(33, 33, 33)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgb(33, 33, 33)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(26, 115, 232)",
      "toolbar_field_focus": "rgb(33, 33, 33)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgba(26, 115, 232, 0.66)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_text": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)",
      "toolbar_vertical_separator": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e02ae946-b4d6-4ff9-878a-3707e533998f}"
    }
  }
}