This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Firefox options content advanced uncheck allow pages to choose their own fonts annotated. en The advanced font options in Mozilla Firefox version under an English language Windows operating system created to show the details of the Fallback Character Encoding drop down menu The red arrows numbered one to three indicate the sequence