You might check out .internal instead which was recently approved [1] for local use.
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This can be addressed by hijacking an existing TLD for private use, e.g. mything.bb :^)
If you want to be sure, use mything./ : the . at the end makes sure no further domains are appended during DNS lookup, and the / makes the browser try to access to resource without Googling it.
That's hardly the only example of annoying MONOBAR behavior.
This problem could have been avoided if we had different widgets for doing different things. Someone should have thought of that.