Yahoo! Mail Notifier

Z 3 z 5 gwězdkow pógódnośony

wót PSCO2007 dnja Jan. 3, 2015 · trajny wótkaz

This add-on, which I got to replace Yahoo Messenger (which stopped this service with no warning) only works until the next reboot.
It then has to be downloaded again!
How hard would it be to stay active?
When it works, it's fine, and I have no other problems,such as are mentioned below.