Can you please report this on our issue queue? From a cursory search, it doesn't look like anyone complained about scroll zoom on Firefox under Linux before. We'd be happy to fix this after hearing more details. https://github.com/mapbox/mapbox-gl-js/issues
I have nothing concrete to report, I slide 2cm, it works, settle down, slide 2 more and it goes nuts or not. Impredictable UX. But it's cool and flashy.
I just avoid sites using mapbox-gl as much as I can...
Or, you could help us fix the issue so that all Mapbox maps work great for you? Could you record a screencap of this issue and submit a GitHub ticket? We honestly have never seen anything like this ever reported.
