Not opening in new tab Puntuado con 4 de 5 estrellas

I am getting a white blank tab, as if we click a new tab button, opened when i left click the Quickfox Notes icon.Right click is working well and i am getting Quickfox Notes in a separate window for that. Is this behavior due to installation of any other Add-on? I am using 3.5.7 version...Pls help...

Esta valoración es de una versión anterior del complemento (2.1C).