Resolves: rhbz#993963 NULL m_pWindow on firefox deleted plugin
Resolves: rhbz#993963 NULL m_pWindow on firefox deleted plugin

Change-Id: Idb12b12e4313668bf3390a97551c688ee0dcde67

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core