The rumor is that most FF extensions will work in CometBird.
However the extensions (eg unMHT), only have a Button to install it into FF.
How do we tell it, to install into CometBird ?
If the extention is .xpi file, you only need to drag-and-drop on the CometBird interface, and it will remind you to install, click the “install” button, and restart CometBird after the installation finished.