@josh Perhaps the app isn't the problem, the browser is? With less than 3% market share globally, Firefox has been behind implementing standards, and lacks features like support for PWAs, making it difficult and expensive to include in a software development project. In business web app development, I think it has been many years I have seen a project that included Firefox in the list of targeted browsers. Unvarnished economics.

Not that using it is wrong, it just comes with certain realities.