how to preserve Gmail login status/cookies?

[edjusted]

I've got Cookie 5 on Mojave set up to preserver cookies from Google.com and to delete other cookies when I quit Safari. But when I re-launch Safari, I find that I've been logged out of Gmail and need to log back in. This is a pain as I'm usually logged in to multiple Gmail accts and I have to log back in to every one every time.

Does anyone know what else I can do to preserve my Gmail logged-in statuses?

[SweetP]

@edjusted if you expand the Google website, then look for any red colored cookies. In particular, Im sure the nid cookie is the one you want to whitelist

• then right click (control-click) to show the contextual menu
• select Add to Whitelist