I have an iMac M4 running Tahoe 26.2, which has an admin account and three user accounts. Last time I tried to open Firefox in one of the user accounts, it asked for an admin password to install a helper, presumably to update. Rather than responding, I switched to the admin account and updated Firefox manually, (from the "about" option). If I now try to open Firefox back on the user account, I still get that request, but even after I enter the admin credentials, Firefox won't open. It does however open on the admin account and the other two user accounts, not getting the "helper" window at all. I have reinstalled Firefox (twice), and removed the profile form the troublesome user account, but the problem recurs. Where is the problem and how do I fix it? I tried starting Firefox in trouble-shoot mode, but nothing changed. When I try starting Firefox from the Terminal with the -P option, I get the following message miki@Mikeliss-iMac MacOS % ./firefox -P 2026-02-11 18:14:06.242 Firefox GPU Helper[94978:60675173] Failure on line 688 in function id scheduleApplicationNotification(LSNotificationCode, NSWorkspaceNotificationCenter *): noErr == _LSModifyNotification(notificationID, 1, &code, 0, NULL, NULL, NULL) 2026-02-11 18:14:06.281 Firefox GPU Helper[94978:60675275] Connection Invalid error for service com.apple.hiservices-xpcservice. 2026-02-11 18:14:06.281 Firefox GPU Helper[94978:60675173] Error received in message reply handler: Connection invalid UNSUPPORTED (log once): POSSIBLE ISSUE: unit 1 GLD_TEXTURE_INDEX_2D is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable