Thanks for the feedback! Can you tell me more about what Firefox version / OS isn't working properly for you? I have seen it work well on:
- Firefox 57.0.1 (64-bit) Ubuntu 17.04
- Firefox 57.0.1 Android Oreo (Nexus 6P)
- Firefox Focus 4.0.1 Android Oreo (Nexus 6P)
- Chrome 63.0.3239.84 (64-bit) Ubuntu 17.04
- Chrome 63.0.3239.111 (32-bit) Android Oreo (Nexus 6P)