Now that's one way to block annoying online ads — developer uses a $5 dongle to squeeze in 537,000 domains into just 4MB of flash memory

<p>Christian Cawley has extensive experience as a writer and editor in consumer electronics, IT and entertainment media. He has contributed to TechRadar since 2017 and has been published in Computer Weekly, Linux Format, ComputerActive, and other publications. </p><p>Beyond TechRadar, he heads up the team at smart home website Matter Alpha, and writes about retro gaming at Gaming Retro.