: Once activated, clicking anywhere on a webpage causes the cat to fire a laser, deleting that specific text or image from your view. Interactive Fun

It's possible you're thinking of:

The mode usually lasts between 8 and 15 seconds, with a cooldown of 30 seconds. During this time:

Mischievous Mode is designed for entertainment rather than utility. It serves as a stress-relief tool or a funny way to "vent" at a frustrating webpage or a long article. It essentially turns the static experience of reading a website into a mini-game of chaotic cleanup. Laser Cat - Chrome Web Store

In the mobile game (developed by One Tap Closer), Mischievous Mode is essentially the core gameplay loop where you lead a cat through a "chaotic journey" of destruction .

— Sometimes "mischievous mode" is used humorously to mean the cat deliberately messes with your aiming, blocks the laser, or creates unintended "solid content" (like temporary walls or objects) to be annoying.