[HOT] enabling remote Josm on tasks.hotosm.org/

[Bill]

I'm guessing you may need to provide more information (e.g. versions of the
software, browser version, OS, etc).

I set this up on Linux & Chrome a while back and it just worked (which was
quite unexpected since Linux is usually more tedious for this type of
thing).
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Thanks. It is FF 53.0. Desktop.

I found that it works in Safe Mode in Firefox. I check addons for a conflict.