2 problems in Firefox!

I’m using @font-face to display a font on a site I’m working on. Works fine in Chrome and Safari, but in Firefox the font won’t show up..

I also have a problem with some spacing i think. There is a white line appearing over my navbar, and it’s Firefox only too.. what is this?

You can find the site here: https://bit.ly/a7L0l5

Any help is highly appreciated!