Issues with K-Meleon launching other apps

When K-Meleon has to launch another app it will prompt which app you want to use and at first the only available option in this case was "Roblox", but pressing the ok button doesn't cause anything to happen and the prompt is still there. If I manually select the executable and press ok then it launches fine. I don't know if this is a problem with other programs or web browsers but the combination of these two programs at least cause problems.

ROS Verison: 0.4.12

K-Meleon Version: 75.1 (From RApps)