Thanks you :)

can you send screenshot detail this issue to email pentest137@gmail.com

Hi, can you email to pentest137@gmail.com detail this issue?

yes of course. You can use both chrome and firefox with one license.

Thanks for your feedback, new firefox does not support user interface below address bar. Devtool space is best which I chose.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/user_interface