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
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/