Upgrade Storagetweaking the bibliography
in the bibliography I would like to remove the comma before et al, the period after et al and period at the end of bibliography
also I would like to remove the comma after et al in citation as well
also I would like to remove the comma after et al in citation as well
In general, see https://www.zotero.org/support/dev/citation_styles/style_editing_step-by-step