I dont get it, is it the icon you want to remove or what? If it is just reverse how you can put it there

• Click on the menu button new fix menu on the top right corner of the browser.
• Click +Customize to see Firefox's additional tools and features.
• Drag the icon down

https://support.mozilla.org/en-US/kb/where-firefox-hello-button

To disable Hello you can toggle loop.enabled to false on the about:config page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

cor-el said

To disable Hello you can toggle loop.enabled to false on the about:config page. You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

thank you.