https://support.mozilla.org/pt-BR/questions/1242090
Firefox 63.0.2 for Android (Android 8) Filereader.readAsDataURL() error with...
for androidfirefox
https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL
FileReader: readAsDataURL() method - Web APIs | MDN
The readAsDataURL() method of the FileReader interface is used to read the contents of the specified Blob or File. When the read operation is finished, the...
web apisfilereadermethodmdn