Just spotted this commit :
https://github.com/Zimbra/zm-web-client ... efaa7831bf
Does this mean the classic web client is losing offline mode?
From commit :
Instead of remove entire offline related code from app which may cause the problem if we touched essential code. We did following changes to disable offline mode.
Removed offline mode menu item from user menu.
Removed _offlineSettingsListener method which was called by offline mode menu item.
Translation key which was used in above.
Permanently set isWebClientOfflineSupported to false;
ZBUG-2592: Completely disable offline mode #868
Re: ZBUG-2592: Completely disable offline mode #868
Browsers (specifically Chrome) had already phased out the technology used by Offline mode, see viewtopic.php?f=15&t=68669
Re: ZBUG-2592: Completely disable offline mode #868
Ta. Ugh.. Google. This is why we can't have nice things.