Sandboxie-Plus 1.16.1 (Pre-release)

I have identified the issue, connecting to the windows task scheduler service blocks for about a minute when the required RPC port is not available.
If you wait long enough FF will work normally.
there is a workaround
ClosedClsid={0F87369F-A4E5-4CFC-BD3E-73E6154572DD}
I'm looking further into that issue for a better fix, or to confirm that this one is good enough

 

the schedule service?

 

this: https://en.wikipedia.org/wiki/Windows_Task_Scheduler

 

!

 

?

 

the UUID you gave is from the "task scheduler", thats right. and its a service. sorry, for the interruption.
but i dont see any connection to RPC. (to the remote)

 

taskschd.dll uses RPC to communicate with the service and offer an API to enum/add/remove/alter scheduler Tasks.
Instantiating this interface since that KB hands for about 60 second, by entirely blocking that interface we avoid the wait and fail fast.

 

@DavidXanatos to answer your question on the previous page, the problem is present on ANY version of FF, not just 140 & 141, it's also present on 136.4 (as far back as I have tried). The problem began with updating to the preview CU KB5062660 that takes Windows to 24H2 build 26100.4770. Uninstalling this Windows update resolves the issue, for any version of firefox. The workaround on the other page to paste: OpenIpcPath=firefox.exe,\RPC Control\epmapper into the relevant sandbox ini fixes the problem on all the laptops in the house.

BTW I have found that waiting to let it resolve as per your above comment has not worked on our machines. It was still not working after leaving it for 30mins on the machine I gave it that long with.... BTW I'm not using the portable version of FF like the person on github.

EDIT: Just tried your workaround: ClosedClsid={0F87369F-A4E5-4CFC-BD3E-73E6154572DD} & that works on the machine I tried it on running 24H2 build 26100.4770. Deleted the line OpenIpcPath=firefox.exe,\RPC Control\epmapper before testing, obviously. Thanks!

 

Yes the issue is not FF specific a short test code from Chatty to Enum all scheduled tasks suffers from the same freeze behavior.