'Changing the broadway 2.0 tab name (GTK+3.0)

When running Broadway back-end, the default tab name is "broadway 2.0". I wish to change this to something more meaningful but I'm running into a couple of dead-ends.

According to https://sudonull.com/post/115385-Broadway-rendering-GTK3-interface-in-a-browser-HTML5, the way to change the tab name is to directly edit the source code for the broadway back-end. This seems a bit more complicated as I do not have access to the source code for the back-end. I am on Ubuntu so I assume that the source code is unreachable since Ubuntu is GNOME/GTK based anyways.

I have tried installing the necessary source code and changed environment variables and edited the source code that way but it doesn't appear to do anything.

Is there an easier approach to changing the name? The solution provided in the webpage linked above wants to edit the source code, but it seems easier to directly change the HTML content of the page that is brought up when the broadway back-end is run (this still requires access to the source code though).

EDIT: As a side-note, I am running a GTK app in a Docker container so any solutions that would fix this problem through the Docker container would be helpful



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