I've just tried the command line and it worked (no more black screen).
Though the result is :
nicolas@nicolas-fixe:~$ MOZ_ENABLE_WAYLAND=1 snap run firefox
update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/libreoffice/help /usr/share/libreoffice/help none bind,ro 0 0): cannot create directory "/usr/share/libreoffice/help": permission denied
update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none bind,ro 0 0): cannot open directory "/var/lib": permission denied
Missing chrome or resource URL: resource://gre/modules/UpdateListener.sys.mjs
I've just tried the command line and it worked (no more black screen).
Though the result is : nicolas- fixe:~$ MOZ_ENABLE_ WAYLAND= 1 snap run firefox snapd/hostfs/ usr/share/ libreoffice/ help /usr/share/ libreoffice/ help none bind,ro 0 0): cannot create directory "/usr/share/ libreoffice/ help": permission denied snapd/hostfs/ usr/share/ xubuntu- docs /usr/share/ xubuntu- docs none bind,ro 0 0): cannot open directory "/var/lib": permission denied //gre/modules/ UpdateListener. sys.mjs
nicolas@
update.go:85: cannot change mount namespace according to change mount (/var/lib/
update.go:85: cannot change mount namespace according to change mount (/var/lib/
Missing chrome or resource URL: resource: