Thanks!

Unfortunately it's not possible to open Links in "No Container" in "Automatic Mode" using the right click context menu (or at all at this point). I have to look into that more and see if it's possible from a technical standpoint - if it is, I'll fix it. Additionally a keyboard shortcut for opening "No Container" Tabs is planned too.

I will add opening external links (domain not matching) with only left click as a preference - but you should keep in mind that some sites use an outgoing tracker (e.g. google) on the same domain and hence such clicks would not be opened in a new Temporary Container.

Edit (2. Dec 2017):
It's now possible to use the RightClick ContextMenu on a Link "Open Link in New Container Tab" > "No Container"

Edit (8. Feb 2018):
Took longer than anticipated - but since version 0.34 there's also the possibility to configure regular left clicks to open temporary containers