Font warnings/errors in HTML5 build

I get various warnings based on browser for fonts that I’m using.

In Safari (v 13.0.4 macOS 10.14.6):

[lime.text.Font] WARNING: Could not load web font “Helvetica”

As far as I can tell Helvetica Regular is being used where I want it.

In Firefox (v 74.0)

downloadable font: kern: Too large subtable (font-family: "Open Sans" style:normal weight:400 stretch:100 src index:1) source: http://127.0.0.1:3000/assets/OpenSans-Regular.woff 

downloadable font: Table discarded (font-family: "Open Sans" style:normal weight:400 stretch:100 src index:1) source: http://127.0.0.1:3000/assets/OpenSans-Regular.woff

As far as I can tell Open Sans Regular is being used where I want it.

Do I need to try to fix these? If so, why the different messages for different browsers?

Are you including your own copy of Helvetica with your project?

(Please be aware that web fonts need to be licensed)

If so, then perhaps Safari is disregarding the web font and is using the local system version of the font, which would probably still work fine.

Perhaps Firefox is warning that the font is too large and is disregarding some information, but I would not worry if it looks correct at runtime