CMSB v3 font bug (safari?)

I have changed 

/cmsb/3rdParty/clipone/css/main.css

and my custom theme 

replacing instances of Railway and Open sans with Fira Sans. Which looks really clean and clear and consistent.

This is my personal and preferred look and something I shall be doing in future with my installations.

I would like to see this however as default in future releases as it looks really good.

As far as I can see only weights 300 and 400 are needed for this to work.

From

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300,600,700);
@import url(http://fonts.googleapis.com/css?family=Raleway:400,300,200,100,500,600,700,800,900);


To

@import url(https://fonts.googleapis.com/css?family=Fira+Sans:400,300);


Then change all instances of

font-family: 'Open Sans', sans-serif;

font-family: 'Raleway', sans-serif;



to

font-family: 'Fira Sans', sans-serif;


Do this second part in your custom theme and default themes to ensure that it works.