Beta 4 of Android Q should have had the final APIs - https://android-developers.googleblog.com/2019/06/android-q-beta-4-and-final-apis.html with which bug 1557203 ensured compatibility. The fix for this issue is part of Firefox 68 which has just been released. hectortib can you please confirm (for example with the help of `about:firefox`) that you are using Firefox 68?
Bug 1565540 Comment 2 Edit History
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Beta 4 of Android Q should have had the final APIs - https://android-developers.googleblog.com/2019/06/android-q-beta-4-and-final-apis.html with which bug 1557203 ensured compatibility. The fix for this issue is part of Firefox 68 which has just been released. hectortib can you please make sure you have the latest version of Firefox installed and confirm (for example with the help of `about:firefox`) that it is Firefox 68?