Contextual Identities on the Web
This is like a match made in heaven for Activities in KDE Plasma.http://cukic.co/2016/02/08/heavy-activities-setup/Now if only Firefox AddOns/Extensions would be able to properly access DBus, this would allow for a so much better Linux integration (storing passwords through org.freedesktop.Secret, opening URLs in the appropriate container from KDE Plasma sessions instead of random switches to another activity where a Firefox window is found, global media playback states/control for web video/audio as org.mpris.MediaPlayer2, powermanagement inhibitors through org.freedesktop.login1, etc)