Yettwasezmel 5 ɣef 5 n yetran

I hope this is marked compatible soon with beta9pre, but until then:
Please create a boolean preference named extensions.checkCompatibility.4.0b and set it to false.

This review is for a previous version of the add-on (1.0.10).  Aseqdac-agi ɣur-s acegger yezrin n uzegrir-agi.