I tried siria's popup macro to no avail alas! But then I haven't a clue how to configure it.
The following tweak stops them, I have yet to find out what else it inadvertantly stops.
EDIT: Had to whitelist for browse button to work https://tineye.com/
. . . toggle this Mozilla preference to the desired events:
By default the values are:
change click dblclick mouseup reset submit touchend
I set mine to:
change dblclick reset
The result is no more popups anymore.
But it has a drawback and is that it is too much strict, that blocks even the "browse" buttons/actions in forms. That is the reason that Dorian, the main current developer didn't change it by default. But when there is a problem like this, you can whitelist the site (Tools menu > Privacy > permissions), or slightly change the popup blocker macro to toggle to the preferred values.
Edited 2 time(s). Last edit at 03/09/2018 11:17PM by Mello.