I have encountered an odd problem with my browser that it loses connection every time I play an embedded media (e.g. YouTube) on a webpage. After scanning my computer and testing my addons one by one, I have found that the problem only exists when this addon is enabled. I have used this addon for quite some time and it is a recent problem.

Edit: I haven't been able to reproduce this issue since updating to the latest version today so I'm giving this addon 5 stars instead. It has been really helpful in keeping the URLs clean.