Doesn't prompt Rated 5 out of 5 stars

Got the show prompt checkbox ticked but when it goes over the threshold, the icon changes colour but there is never a prompt.

(Windows 7, FF 11.0).

OK. Got it. Thanks.

This review is for a previous version of the add-on (1.8.1-signed.1-signed). 

The prompt is for the restart, not when it goes over the threshold.