Why did Firebug disappear after the update?

Question

Mozilla Firefox

I’m sitting, then I’m working and then the firefox update came, I was so happy (my favorite browser), I think well done firefox developers. I restart the browser and what I see is that my favorite firebug has fallen off somewhere, it doesn’t seem to be there, but instead of the good old familiar interface, the standard firefox developer panel always pops up.
How to return the good old tool to its usual form without rolling back the browser?

Answer 1

Firebug will no longer be developed. https://addons.mozilla.org/en/firefox/addon/firebug/