websocket option doesn't show up in Firebug 2.0.19 Firefox 53.0.2 32bit on windows 7 64 bit

[dts350z]

Shows as installed but nothing is visible in firebug (despite restarts, reload, etc.)

also tried the "test page"

[heycpp]

see dev tools

[j4rd44]

Press F12 and there is no Websocket Monitor tab.
If you mean another "dev tools", please, let us know.
Firefox 52.3.0 64bit linux