Customized Chromium with built-in VPN
One of my customers required a browser which could connect to other websites only via proxy-server with secured SSL channel.
I downloaded source codes of the Chromium browser, and adjusted it to make all connections pass through a proxy server.
For that task, I had to code and build a simple proxy server with SSL support, to accept connections from this browser.
As a result, the browser I built could successfully pass through Chinese Firewall.