1) iPhone6+ – you will see that the hamburger nav icon shows to the right of the filterable portfolio in line with Limo Service. The logo bleeds downwards to “ALL” option
2) Explorer ditto
3) Chrome ditto
4) Firefox (latest version) – shows the nav icon to the right of “ALL”. The logo icon sits nicely above the “ALL” option.
In effect, Firefox shows this really well – but it is not accurate. Viewport zoom set ‘1’ or none has not bearing on this.
Sorry for the slow reply. I investigated this when I first saw your forum post, found it a bit confusing, and then got distracted unfortunately. It’s a hard one to untangle because there were/are a number of complex styles acting on the elements in your header area.
However, I’ve just looked at your site again and I see that some things have changed. The header element no longer has an explicit height of 10px for instance. Did you manage to resolve this one yourself in the end?