Examine source code of PeptiDark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "PeptiDark",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(52, 45, 40, 0.11)",
      "toolbar_text": "rgba(255, 255, 255, 0.66)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(130, 130, 130)",
      "toolbar_field": "rgb(207, 53, 255)",
      "toolbar_field_text": "rgb(245, 245, 245)",
      "tab_line": "rgb(207, 53, 255)",
      "popup": "rgba(36, 36, 36, 0.88)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_active": "rgba(255, 255, 255, 0.33)",
      "button_background_hover": "rgba(255, 255, 255, 0.11)",
      "icons_attention": "rgb(255, 217, 0)",
      "icons": "rgba(255, 255, 255, 0.57)",
      "popup_border": "rgba(207, 53, 255, 0.11)",
      "popup_highlight_text": "rgb(0, 0, 0)",
      "popup_highlight": "rgb(207, 53, 255)",
      "sidebar_border": "rgb(207, 53, 255)",
      "tab_loading": "rgb(52, 255, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgba(255, 0, 0, 0)",
      "toolbar_field_border": "rgba(255, 0, 0, 0)",
      "toolbar_field_focus": "rgba(52, 45, 40, 0.99)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(207, 53, 255)",
      "toolbar_field_separator": "rgb(194, 0, 255)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgb(194, 0, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{588313b2-ff4e-40aa-b66a-714a26691080}"
    }
  }
}