In bug #33180 PluginViewQt.cpp got extended to support private browsing for plugins. The bug equally applies to Gtk+. We are already sharing the PluginPackage, we should look into sharing the PluginView as well but it is a bit more difficult.
Created attachment 49702 [details] Add private browsing for plugins to PluginViewGtk.cpp This is the same code from PluginViewQt.cpp applied to PluginViewGtk.cpp
Comment on attachment 49702 [details] Add private browsing for plugins to PluginViewGtk.cpp Looks good to me.
Landed in r55405.