Google's 2010 Pac-Man doodle unexpectedly auto-played in Firefox via an extension

A 2010 Google◼ Doodle that autoplayed Pac-Man after ten seconds of homepage idle time was loaded silently in the background by the CoolPreviews Firefox◆ extension at browser start-up, causing unexpected audio. The developer, Marcin Wichary, deployed a hotfix within hours that added a mute control and required a user click before playback, which stopped the extension's invisible page loads from triggering sound. No CVE or vulnerability is involved; the incident is a side effect of an extension prefetching pages.

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