Ubuntu LTS 22.04 how to report a bug?

[Alessandro Baggi]

Hi list,
I'm using XFCE4 on UBUNTU LTS 22.04. I installed xfce4-docklike plugin 
manually because it is not available from Ubuntu Repos.

I noticed that I cannot pin firefox snap (channel esr) icon on the dock.

After some search on the system I noticed that the .desktop file of the 
snap package has a bad name under:

/var/lib/snapd/desktop/applications

as firefox_firefox_desktop.

Renaming it to firefox-esr.desktop fixes the problem but at the next 
package update the problem could come back.

How I can fill a bug for that specific problem? I should create bug for 
the snap or for Ubuntu?

Sorry I'm new to Ubuntu.

Thank you in advance.