This bug was fixed in the package firefox - 87.0+build3-0ubuntu3
--------------- firefox (87.0+build3-0ubuntu3) hirsute; urgency=medium
* Set MOZ_ENABLE_WAYLAND only in Wayland sessions (LP: #1923116)
-- Olivier Tilloy <email address hidden> Fri, 09 Apr 2021 20:25:05 +0200
This bug was fixed in the package firefox - 87.0+build3- 0ubuntu3
--------------- 0ubuntu3) hirsute; urgency=medium
firefox (87.0+build3-
* Set MOZ_ENABLE_WAYLAND only in Wayland sessions (LP: #1923116)
-- Olivier Tilloy <email address hidden> Fri, 09 Apr 2021 20:25:05 +0200