Somehow, though, I installed uBlock Origin 1.14.14 on Pale Moon 27.5.1 on my main computer. It appears to work fine.

Don't laugh, but I have no recollection of doing it, or rather, I don't remember using any special "tricks" to install it.
I did it on 23 Oct, which I know it was just two days ago, but that's the day my home-office was painted. I was working with my desk pushed into the middle of the room (it's usually against the wall), and I had two painters walking around and talking - which I guess distracted me.
Can anyone figure out how I did it?
The reason I'm asking is that when I try to install it "normally" on one of my other machines, I'm told the xpi file is corrupt.
Just for the record, I was able to install it on my laptop by simply copying the extension's folder from my desktop to the laptop

