[BUG] Containers button cannot be removed from URL field

[ghost]

Current situation
I am using the Container addon in such a way that I have added the Container button to the Mozilla Firefox toolbar (see screenshot 1) to access all the functions from there. This button is much more functional than the Container button that sits in the URL field (see screenshot 2).

Issue
The Container button from the URL field cannot be removed. Having two buttons for the same addon is redundant, especially because the button in the URL field has fewer functions.

Expected behavior
There should be an option (in the right click context menu or somewhere else) to remove the Containers button from the URL field.

Information
OS: Win 10 21H1 x64
FF: 89.0 x64
Container Addon: 7.3.0

Screenshot 1

Screenshot 2

[regifr]

need to remove "Always open this in a Container" icon from url bar

[blekmus]

It also doesn't seem to adapt to the browser theme as well. But would love to have an option to disable it completely.

[dannycolin]

Close #2066