Firefox extension doesn't want to work after upgrade to 91.0.1

[danjde]

Hi to all,
just after upgrading to Firefox 91.0.1 (64 bit) on Ubuntu 20.04, the icon bar is disappeared.
On Extension menu "XDM Browser Monitor" seem enabled and running, but the icon is disappeared and no download possibility is offered by visiting websites with videos.

"xdman" daemon is running.

Thanks!

[danjde]

Solved: using max privacy mode on Firefox, it is necessary allow XDM in anonymous windows.

Thanks!