Hello,
It's best to write a comment here instead:
https://bugzilla.mozilla.org/show_bug.cgi?id=1871632
or here:
https://discourse.mozilla.org/t/is-there-a-plan-to-allow-addons-override-new-tab-page-on-android/125410
Sadly, there is nothing more I can do about this situation. Only Firefox team can fix it.
Best Regards,
Juraj Mäsiar