have you tried turning off the setting for "Recommend extensions as you browse" or "Recommend features as you browse" ?
in the about:preferences#general browsing section
A community for discussion about Mozilla Firefox.
have you tried turning off the setting for "Recommend extensions as you browse" or "Recommend features as you browse" ?
in the about:preferences#general browsing section
You can most likely add a CSS rule to the userchrome.css to hide it