Puntuado con 3 de 5 estrellas

por Andy_P el Dic. 18, 2014 · enlace permanente

I have just tried to install this add-on to Thunderbird 31.3.0.

It says it is installed, but when I right-click the Toolbar and select customize, I cannot find a button labelled "Titlebar Cleaner" in the list of available icons.
Please help.