Tahap 3 daripada 5 bintang

oleh Andy_P pada Dec. 18, 2014 · pautan kekal

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.