Firefox version 57, otherwise known as Firefox Quantum, has done wonderful things to help get Mozilla’s open-source web browser back in shape, but along the way, the company has made a few mistakes. One of the biggest of Mozilla’s recent flubs was an exploit hidden in Firefox’s user interface code that made it possible to for an attacker to run unsanitized HTML on a user’s computer.

What started out as a seemingly simple bug turned into a real hassle when people figured out it was possible to crash iMessage, Twitter or even the Wi-Fi app on Apple products by inserting a single character from the Indian language of Telugu. And once an app had crashed, it would keep crashing forever until you took somewhat extreme measures like deleting and reinstalling the app, erasing entire conversation threads, or upgrading to a beta version of your device’s OS.

Wireless carriers have already demonstrated an inability to understand what “unlimited” actually means, offering phone plans that habitually throttle customers who use more than 26GB or so of data every month. However, with the release of its new Above Unlimited plan, Verizon is pushing the mental gymnastics carriers employ to define unlimited to a whole new level.