"has anyone had a similar problem?"
It looks like Mozilla has judging by their support page. If you have access to a machine which will connect to the internet have a look, they have quite a few suggestions/remedies.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.