Hello.
I was looking for internet browsers that still support XP and something caught my eye, a chinese browser called Extreme Explorer 360 (Chrome 360). It was advertised as Chromium 78 based so I decided to give it a try and to my surprise it actually worked. 
At first I thought that there was absolutely no way that it could be based on Chromium 78 but after several tests it proved me wrong.
Here's why I do believe that it is in fact based on Chromium 78:
- According to HTML5test.com, this browser gets a higher score than any other XP browser in terms of HTML5 support and features.
-
WhatIsMyBrowser.com reports the browser as Chrome 78 running on Windows Server 2003 (XP x64)
In case someone wants to try it on their own:
On 4/29/2019 at 8:25 PM, Windows 2000 said:
A direct download link from Mega provided by @win32:
Quote
EDIT:
I do actually recommend it as a main browser now as it is based on a significantly newer Chromium version, which is also a lot safer than other much older officially supported browsers.
EDIT 2:
The browser has been updated to Chromium 78 from 69 and still supports Windows 2000 (with all of the latest unofficial updates), Windows XP and Windows Vista.