PM is set to show the default home page.
Also: PM behaves unstable right from starting it, like it is about to crash (Not responding often, black patches appearing and the back button becomes disabled for no reasons, and it indeed crashed several times).
Tried to refresh PM manually by backing up and deleting my profile, and creating a new one and importing passwords, bookmarks and extensions, since the option for refreshing Pale Moon, has gone in version 28: still didn't helped.
I had little options but to downgrade back to version 27.9.4, in order to solve the problems.
Please take care about this.