As said in the email which announced the release of Icecat 13.0.1:
> * IceCat is now shipping with the latest versions of LibreJS, Https
> Everywhere, and Priv3.
When starting Icecat 13.0.1 I noticed that a custom toolbar I had created
a long time ago was disappeared.
As I suspected this could be related with one of the addon shipped with Icecat
13.0.1, I have tried to disable these addons, one by one.
Well, my custom toolbar has come back when I restarted Icecat after Priv3 was
Maybe there is something wrong with Priv3?