[jasode]

>I'm running 69.0.2 on Ubuntu and it works just fine here.

Thanks for your help. I just tried another test and installed the latest Firefox 70.0 on a clean Windows 7 machine and it does not work there either.

I also tried Ubuntu 19.04 with Firefox 69.0.2 and it does not work there either.

To be clear, pasting the javascript in a console tab of Developer Tools always works. It's only the url bar that seems to ignore javascript.

[baltpeter]

URL bar doesn't work for me either but saving it as a bookmark does. Here's a quick recording: https://cdn.baltpeter.io/tmp/firefox-bookmarklet.gif