Version 1.5.1 updated August 18, 2018 adds the latest compatibility improvements, and now requires no special permissions of any kind. This will block font and glyph fingerprinting from any sneaky website that tries to gather a list of installed fonts for the purpose of tracking and profiling your browser and device. This extension is to only allow the default list of fonts that came installed with Windows to be detected. This doesn't change the look of any website and is very lightweight. Plug-and-play to work automatically.