As of this writing the Debian chromium package lacks a simple way for each webextension to be enabled. The extension can be loaded by adding a --load-extension call to chromium. This can easily be accomplished by copying /usr/share/doc/webext-*/chromium.d/load_extensions to /etc/chromium.d/. This file will make sure that all webextensions are loaded when chromium is started. -- Michael Meskes , Wed Feb 18 09:14:47 CET 2018