Is there a way to change the master_icon and favicons?

[EricLauber]

I am using docker-firefox to enable an old iPad to access tools like Home Assistant. When I bookmark the page to the iPad home screen, it has the Firefox icon. I'd like to change that to Home Assistant - as far as I can tell, that means I need to overwrite the icons in the docker-firefox container.

I may eventually create a new container based on this one and write this in a dockerfile but for the moment I'm just trying to do the work manually.

I see as part of the existing dockerfile a call to run the shell command that sets the images up per the base-image's expectations.

RUN \
    APP_ICON_URL=https://github.com/jlesage/docker-templates/raw/master/jlesage/images/firefox-icon.png && \
    install_app_icon.sh "$APP_ICON_URL"

I didn't know if the install_app_icon.sh was still available in the resulting docker image, or if I could even re-run it again, so I haven't bothered with that.

Running docker-firefox, I extracted the images located in /opt/novnc/images/icons and created updated ones based on the Home Assistant assets available here. I then copied them back into the docker container and overwrote the existing icons.

1. I opened the dockerIP:port to view Firefox. Still has the Firefox logo.
2. I stopped and restarted the container (without rebuilding it). Still no change.

Obviously I'm doing this wrong. If I wanted to replace the icons, what are possible ways to do so?