I noticed a while ago that webextension menus fail to appear. Only the arrow of the doorhanger appears. I did a test with a new profile with FF 56.0.2 after installing a couple WE addons. The same thing happens. This makes some WE addons partially or completely unusable. I attached an APNG for clarity.

What operating system are you on? What is the value of extensions.webextensions.remote? Do you have a link to some of the extensions?

(In reply to Andy McKay [:andym] from comment #1) > What operating system are you on? I submitted my platform in the bug report. > What is the value of > extensions.webextensions.remote? Do you have a link to some of the > extensions? False. (Caused issues so I had it locked to disabled ) Changing it to true seems to work for the new profile I tested with, but not with my main profile, where the menus remain broken even after doing so. They're rather common ones: https://addons.mozilla.org/hu/firefox/addon/ublock-origin/versions/beta https://addons.mozilla.org/hu/firefox/addon/screengrab-fix-version/versions/ plus: https://my.jdownloader.org/apps/ Anyway, it doesn't seem to be addon specific at all. Either all work or none.

It looks like I figured it out. It looks like enabling apz.allow_zooming breaks it. (I accidentally set it to true for the new profile)

Ah thank you, yes there are problems with APZ and webextension popups.