I hate to bother you with commenting on an ancient post, but if you are still maintaining this script you probably want to know that Firefox Quantum (57+) has totally broken it. It was working great before the update, and I was completely willing to blame the bare bones Greasemonkey 4 update for the problem, but it doesn't work with Tampermonkey either.

Tampermonkey does indicate there is an error in the script so here's a screenshot:



The red X says "Expected an assignment or function call and instead saw an expression" in the hovertext.

I enjoyed the script for years and miss it, but I totally get it if you have moved onto other things. :)