{{tag>Brouillon Pb App Email}} = Pb Icedove / Thunderbird [[https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/196058]] You can restore the windows border with these steps: # Close Thunderbird # Edit the file ~/.mozilla-thunderbird/xyz1234.default/localstore.rdf # Search the entry # Change the width, height and screenXY entries to the ones you see here # Restart Thunderbird and it should have its borders again.