Examine source code of Old Electronics

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Old Electronics 2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(26, 26, 26)",
      "toolbar_text": "rgb(251, 184, 108)",
      "frame": "rgb(45, 45, 45)",
      "tab_background_text": "rgb(214, 189, 157)",
      "toolbar_field": "rgb(35, 35, 35)",
      "toolbar_field_text": "rgb(251, 184, 108)",
      "tab_line": "rgb(214, 189, 157)",
      "popup": "rgb(26, 26, 26)",
      "popup_text": "rgb(251, 184, 108)",
      "icons_attention": "rgb(132, 236, 162)",
      "popup_border": "rgb(162, 144, 121)",
      "popup_highlight": "rgb(70, 70, 69)",
      "tab_selected": "rgb(82, 77, 63)",
      "tab_text": "rgb(255, 237, 223)",
      "toolbar_field_border_focus": "rgb(59, 58, 57)",
      "toolbar_field_highlight_text": "rgb(255, 237, 223)",
      "toolbar_field_highlight": "rgb(87, 79, 70)",
      "toolbar_field_text_focus": "rgb(241, 197, 125)",
      "tab_loading": "rgb(214, 189, 157)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c858afbc-add9-48cc-b837-6901e3ae836e}"
    }
  }
}