Overview White Background Enforcer (WBGE) is a small, open-source browser extension – made especially for Zen browser – that enforces (by default) a white background on transparent pages and pages that do not have a background-color set.
Options The extension can be disabled and the color of the background can be changed using the extension's Toolbar Button or the extension's Preferences tab in Add-on Manager (about:addons) > Extensions > White Background Enforcer. Some websites may need cutom rules for WBGE to function how you would like. Custom rules are documented in the extension's README on GitHub.
