I have a kindle fire 7, Android 5.1.1 with the latest Chrome installed (v84). I wrote a simple PWA (progressive web app) template, and also have tried some known sites that have progressive web apps, but I never get that install button to render in Chrome, meaning apparently the beforeinstallprompt even is never fired, although I know that the sites are valid PWA sites since they are installable in the desktop version of Chrome.
Is there an android or chrome setting that I can tweak to be able to install the PWA on the kindle fire?