I have created a local web app for Android that I want to use with Firefox. My problem is that I'm not able to get the desktop shortcut to have the app icon, and even on the tabs in FF, a white S on a green background is displayed (it's the same icon used for the shortcut).
Chrome is able to display the icon but due to various reasons (http vs https restrictions, inability to access external SD card storage, inability to create desktop shortcut for local web apps...) I have to use Firefox.
I have used the content generated with https://realfavicongenerator.net to no avail. Websites, though, do display their icons both in tabs and when a shortcut is created on the desktop, so FF is not broken on the device.
I have read through some of the questions here on SO (this and this) as well as the FAQ on realfavicongenerator.net but nothing points specifically to locally stored web apps and FF.