It may be an unexpected use, but this tool is very helpful when I share my firefox window on online meetings. Because when I share a window, the pointer isn't shared with other participants.
With Mouse Pet. audience can knows where's my pointer. Strangely enough, I can't find any other add-ons like this. So it's the only add-on that works like this.
Thank you so much.

It gets in the way and doesn't work properly.

muy bueno

Funciona! E é muito engraçado xD