Hi, it might help if you could please specify:
1. Operating system
2. Firefox version
3. YouTube video which doesn’t get resumed?

Thank you!

Thank you for reporting. Though, it would have been preferable if you were to raise the issue by other means, for example in Facebook messenger. Here is a link to company's page in Facebook: https://www.facebook.com/Appteligent

It would certainly be appreciated if you reconsider your review.

Thank you!