Mouse input doesn't work in some extension panels in Gecko/Iceweasel #24
Description
e.g. uBlock Origin's popup can be opened from the button in the toolbar but then you can't click within it. Seems this happens with multiple extensions: @kallisti5 reported it with Bitwarden, and it also happens at 9:03 in this video: https://www.youtube.com/watch?v=ZnkQsf7G1Ao
CC @kenz-gelsoft.