Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

How can I prevent Firefox from applying the default font setting to my web app?

  • 5 fhreagra
  • 1 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó cor-el

more options

I have a web app that uses the font Roboto. When running the app and opening its localhost address on Firefox, the app is rendered in Times New Roman (my Firefox default font). Changing the default font also changes how the app is rendered. How do I prevent Firefox from applying the default font? I want to see my web app as it is, in Roboto.

Opening the web app in other browsers does not have any issues.

I have a web app that uses the font Roboto. When running the app and opening its localhost address on Firefox, the app is rendered in Times New Roman (my Firefox default font). Changing the default font also changes how the app is rendered. How do I prevent Firefox from applying the default font? I want to see my web app as it is, in Roboto. Opening the web app in other browsers does not have any issues.

All Replies (5)

more options

nexus_asyap said

I have a web app that uses the font Roboto. When running the app and opening its localhost address on Firefox, the app is rendered in Times New Roman (my Firefox default font).

Hmm, what do you mean by "opening its localhost address"? Firefox may apply cross-site restrictions to web fonts. Could you check the Browser Console for any relevant security-related messages?

https://developer.mozilla.org/docs/Tools/Browser_Console

more options

jscher2000 said

nexus_asyap said
I have a web app that uses the font Roboto. When running the app and opening its localhost address on Firefox, the app is rendered in Times New Roman (my Firefox default font).

Hmm, what do you mean by "opening its localhost address"? Firefox may apply cross-site restrictions to web fonts. Could you check the Browser Console for any relevant security-related messages?

https://developer.mozilla.org/docs/Tools/Browser_Console

The app is just something I run locally using bokeh, a Python library. I start the service and enter localhost:<portnumber> on Firefox to open it.

Attached is a screenshot of my browser console after loading the page.

more options

Do you see the Roboto as one of the fonts being used?

Is this font installed locally?

What CSS code do you use to apply this font?

more options

cor-el said

Do you see the Roboto as one of the fonts being used? Is this font installed locally? What CSS code do you use to apply this font?

Yes. Roboto Light is the only font under font-family. It is also installed locally and is usable in other programs. Opening the app in Internet Explorer renders correctly as well.

Here is the CSS code. It also includes "Roboto Light" under font-family.

  • {
   font-family         : "Roboto Light";

}

/*--------------OVERRIDE BOKEH DEFAULT ATTRIBUTES--------------*/

.input{

   font-size           : 20pt !important;
   padding-top         : 5px !important;
   padding-bottom      : 5px !important;
   height              : 50px !important;

}


/*-------------------------CLASSES------------------------------*/

.emphasis{

   font-size           : 30pt;
   text-align          : center;
   display             : block;

}

.object{

   font-size           : 20pt;
   text-align          : right;
   padding-top         : 30px;      
   display             : block;

}

.labels{

   font-size           : 20pt;
   text-align          : left;

}

more options

On Windows Firefox may not distinguish between the various fonts that belong to specific font-family and treat them as one font family. A specific variant is chosen based upon what font style and variant and weight rules are specified via the CSS properties.

You may have to add a font-weight:300; rule.