I came back to my computer with my cursor going apeshit crazy. I had windows everywhere and it was just onscreen chaos. I coldboot my computer, hoping this would solve my computers temper tantrum (it is going on 3 years old), but no. The cursor was moving on its own free will, opening things, DVD player (wtf?), search, finder, etc so on and so forth. I realized this wasn't just my computer being hormonal, something was actually wrong. Long story short: I had to delete Mozilla and all my bookmarks (wompwomp) from my computer. Restart my computer and then everything *seems* to be alright. I have a Mac. This is where the "Macs don't get viruses" comes in to play. Macs can get viruses, but the problem is easier to fix. I deleted Mozilla and whatever crap that was screwing with my computer through Mozilla (at least, this is how my brain has justified it, as now everything is better once Mozilla is gone, and this is after the computer sitting for 8 hours turned off so it could think about what it had done. bad computer! Bad computer!) So, if you have Windows, I have no idea what would happen for you all.
Anyways. There are two warnings to be had here. 1: There's a scam on Pinterest. Do not fall for it. Check your URLs. 2. That scam seems to have a trojan/virus/alien/pest/annoyance/thingy thing attached to it.