Custom CSS file for Chrome

Custom.css

/*
This is a custom css file for Chrome. It can be used to create an
initial stylesheet for a document.

It should be placed in the following location:
Windows: C:\Users\<user>\AppData\Local\Google\Chrome\User Data\Default\User StyleSheets

Mac: Mac: ~/Library/Application Support/Google/Chrome/Default/User StyleSheets/Custom.css

Linux (Chromium): ~/.config/chromium/Default/User StyleSheets/Custom.css

License:
Copyright (C) 2013 Colin Angus Mackay

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the 
"Software"), to deal in the Software without restriction, including 
without limitation the rights to use, copy, modify, merge, publish, 
distribute, sublicense, and/or sell copies of the Software, and to 
permit persons to whom the Software is furnished to do so, subject to 
the following conditions:

The above copyright notice and this permission notice shall be 
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

body
{
	background-color: #ffe;
	font-family: Bookman Old Style;
	text-height: 1.2em;
	padding: 1em;
	margin: 1em;
}

h1
{
	font-weight: bold;
	text-height: 2em;
}

h2
{
	font-weight: bold;
	text-height: 1.6em;
}

h3
{
	font-weight: bold;
	text-height: 1.4em;
}

pre
{
	font-family: Consolas;
	border: 1px solid #cc7;
	background-color: #ffa;
	padding: 0.4em;
	margin: 0.4em;
	-webkit-box-shadow: 0.2em 0.2em 0.3em 0 #cc9;
}

code
{
	font-family: Consolas;
	font-weight: bold;
}

blockquote
{
	border: 1px solid #ddd;
	background-color: #fff;
	padding: 0.4em;
	-webkit-box-shadow: 0.2em 0.2em 0.3em 0 #ddd;
}

I assume this works in the same way as Safari does with its Advanced Settings stylesheet? Or have I misunderstood? So far I'm not seeing any difference on sites in Chrome.

I'm sorry, this was posted 12 years ago and it looks like this feature is largely deprecated in modern Chrome. The User StyleSheets directory method hasn't worked reliably in Chrome for many years. There are browser extensions that do similar things, but I don't use them, so can't really recommend any.

Aaaah! I should'e done a bit of due diligence before commenting! I've now found this to be the case, how frustrating!