I tried it on Firefox Android, the text I write doesn't appear until I close the keyboard or press space. It is also extremely slow, like 5 FPS slow, scrolling is painful and the ripple animation in buttons lags too much. Long press to select text doesn't work, double tap selects a single word but doesn't use the native selection that gives me two handles to select more text to the left or right, the navigation keys on the keyboard are all disabled and so are the select and copy buttons. Line splitting is a mess and not properly done, here's a screenshot of some of the issues https://i.imgur.com/ApHDGuQ.jpg