Dint work,try to debug or something

Doesn't work in Zen browser. Instead of unloading the current tab it went to the next tab. This is different from right-click > unload tab.

I verified that ctrl+shift+U did that only when the extension was enabled. When it was disabled, it did nothing.

But if it worked, I would love it. I also love the 8.9KB size, the smaller the better!