broken Rated 2 out of 5 stars

Unable to install it anymore, xpi download only possible by extracting url from html code.
It shows successfully installed but didn't show up

This review is for a previous version of the add-on (0.18.0.1-signed.1-signed).  This user has a previous review of this add-on.

Insufficient problem description

Installation depends on Mozilla add-on site; use developer information from https://github.com/mkovatsc/Copper for manual installation.

To use the add-on, you need to enter a CoAP URI into the address bar, e.g.: coap://californium.eclipse.org/