The comment is upvoted now, but possibly the downvotes were for describing it as a "trick". One of the candidates they managed to interview admitted some signatures were forged for $5 each.
The interview says they paid someone for collecting signatures, not forging them. Of course at the price of $5 that might have been implicit at the time.
Same, maybe it's µblock Origin that fixes it? I'm using mostly stock LibreWolf with its preinstalled µBO on a MSW 10 library computer (though btw AdNauseum is a better µBO fork).