User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0

Steps to reproduce:

Using Firefox 67.0.4 with Sway 1.1.1 on Arch. Wayland activated by setting MOZ_ENABLE_WAYLAND=1 in ~/.profile.

1. Open FF with laptop monitor and two external monitors.
2. Disable the external monitors.

Actual results:

Once the external monitors are disabled, FF doesn't show any context menu anymore (neither on right click, toolbar items, etc.).

Note that:

• Context menus are shown again once the external monitors are reactivated.
• Context menus are shown if FF is opened with the laptop monitor alone. (They disappear when I activate then deactivate the external monitors.)

Expected results:

Context menus should be shown in all circumstances.