So far it only happen to YouTube. At first I didn’t know why or what was causing it and then found out that HookTube does something weird. HookTube dot com (it’s safe, nothing malicious) is basically a YouTube proxy that allows you to view YouTube video without being on YouTube.
I have YouTube.com domain blocked with LS. The browser I am using is FireFox Quantum (58.0.2 64bit) and if I open FireFox and visit YouTube it will be denied. But if I watch a clip on HookTube and then visit YouTube.com then LS seems to do nothing about it.
I’m on macOS High Sierra (10.13.3). Anyone experience anything similar?
EDIT: Forgot to mention that this glitch only works IF you have YouTube as a bookmark on your bookmark toolbar and you access it via Middle Mouse Click. OR you click on a YouTube LINK on an offline page.