Be careful with old versions! These versions are displayed for testing and reference purposes.
You should always use the latest version of an add-on.
Version 2.0Released Feb 25, 2018 - 11.93 KBWorks with firefox 42.0 and later, android 48.0 and laterAdd an icon for quick switch.
It is not possible to hide it by default. If you do not want it, right-click and remove the icon.
Source code released under Mozilla Public License, version 2.0