Chrome/Chromium Browser

Hidden Settings

Type chrome://about into you address bar at the top to get a list of all internal pages in Chrome or Chromium browsers. These pages give you a lot of additional configurations, developer options, and information. Many of the hidden configurations can break things, so be careful!

The major one is chrome://flags which has a lot of advanced configuration tweaks.

For similar hidden configurations in other browsers, read this article: http://www.howtogeek.com/139736/how-to-change-hidden-advanced-settings-in-any-browser/