This page glottal fricative /h/ alternates between calling it a glottal fricative and a laryngeal fricative.
Is the reason for it that laryngeally the only option to phonate is to exercise the glottis?
In this case, it is probably random writing practice (perhaps involving multiple authors). The corresponding article on Dutch uses the term "glottal" exclusively, and the Frisian article uses "glottal" only in the first two instances. However, current understandings of the larynx (Esling et al) are that the larynx is a bigger structure which includes the vocal folds (the glottis being the hole between the folds), and there can be multiple kinds of laryngeal fricatives, thus laryngeal and glottal are not interchangeable. Nevertheless, the presumed interchangeability of "glottal" and "laryngeal" will persist in linguistics and language studies for a long time.