Rerun Y2K #8 answer

FLASH

Why FLASH is a Y2K word

Newgrounds cartoons, browser games, and entire restaurant websites ran on one infamous plugin.

About Rerun

Rerun is a free daily word game set in the culture of another time. Season 01 is Y2K: guess one late-’90s or 2000s word in six tries, with a category as your clue. A new puzzle unlocks every day at midnight Pacific.