"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.
Nokia 8 vs Galaxy S8
Best new design books 2017: From vintage infographics to the the psychology of type
iMac 21.5-inch (2017) review
Nokia 8 : design, caractéristiques techniques, date de sortie