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DarkSpectre shows why browser extensions aren’t always safe, with 8.8 million installs linked to malware

A long-running browser-extension operation dubbed DarkSpectre quietly blended into official add-on stores for years—until researchers connected the dots across Chrome, Edge, Firefox, and Opera. Here’s what made it so hard to spot, what the three linked campaigns did, and the simple habits that can help us avoid the next “helpful” extension that isn’t so helpful.