Pinned Tab Duplicator
Automatically clones all your pinned tabs to every new Firefox window you create, with optimized loading. (this duplications feature should be a Fx feature itself already since a long time in my opinion)
1 User
Automatically clones all your pinned tabs to every new Firefox window you create, with optimized loading. (this duplications feature should be a Fx feature itself already since a long time in my opinion)