PURPOSE Browser extensions can change pages, read data, redirect searches, or create security risks if untrusted. WARNING SIGNS Be cautious of extensions you do not remember installing, extensions with broad permissions, changed search engines, unexpected ads, or new toolbars. STEPS Open browser extension settings, disable suspicious extensions, and remove anything unnecessary or unknown. BE CAREFUL Only install extensions from trusted sources and review permissions before installing. REPORT If an extension appears after opening a suspicious file or website, report it.