Why is the web font not loading on our local server?

Hi all,

Within my workplace, we have a local server that is accessed through remote connection. In this, we are encountering an issue where some users within the network have issues displaying the proper font weight and possibly font in their Firefox browser.

The default font is Montserrat, which I believe is not a system font - therefore wondering if this would be the solution.

Alternatively, would uploading Montserrat to the server fix this?

And lastly, if there are any other additional solutions - please provide.

Thank you!