Weird delays caused by this script

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mason2 Scriptwright
FirefoxWindows

I found that if I had a youtube page up in a background tab, whether the video was paused or not, the foreground tabs would not respond to clicks unless the mouse was moved or the keyboard was engaged.

Very strange. Almost like the script or background tab was hogging the focus?

Not sure how else to describe it, but it was easily resolved by removing this script.