  A systematic analysis of the ground state and fission properties of actinides
and superheavy nuclei important for the $r$ process modeling has been performed
within the framework of covariant density functional theory for the first time
in Ref. [1]. A brief review of the results related to the heights of primary
fission barriers and systematic uncertainties in their prediction is presented.
In addition, new results on the potential impact of the isospin dependence of
pairing on fission barriers in fission cycling regions is provided for the
first time.
