This isn't a setting, sounds like you might have a browser plugin doing something?
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Ok, good to know, thanks!
It doesn’t seem likely to be a browser addon because if it were, I’d expect it to have the same effect on other sites and I don’t get logged out after 1 week on any other accounts.
I’ll see if the same thing happens when I log in on a different Firefox profiles and browsers.
Try wiping all your cookies maybe.
Sounds like you're loosing your session cookie, you can poke at it in developer console to confirm its there.
If your session token hasn't changed and is still there but you're logged out, may be a lemmy bug. I haven't seen any other reports like this though.
I haven't had this issue, but I do visit the site every 1-2 days.
Count yourself lucky, I get logged out any time I refresh (click the browser button or hit f5) or restart Firefox on one of my Debian machines.