[andy-wu]

Yep, I experience the same issue on a 2015 13" MBP. Appears to be an issue w/ FF and OS X scaled resolutions (https://bugzilla.mozilla.org/show_bug.cgi?format=default&id=...)

[mitchty]

Oof, that bug doesn't inspire confidence that this will be a worthy experiment. Thanks for the link though, I'll test against a fresh install of osx on a laptop.