1582875 - Reason for font fallback

Status: RESOLVED DUPLICATE of bug 1456844

(DevTools :: Inspector, enhancement)

Description

[james.a.rosen]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0

Steps to reproduce:

1. Specify a valid @font-face that refers to a URL that has some problem. (See What should have happened, below, for more info.)
2. Use that font-face in an element on the page with at least one other font-face as fallback
3. Inspect the element

Actual results:

I can see that the fallback is selected (see also #1429761), but not why.

Expected results:

I'd like to know what caused Firefox to select the fallback font. I can think of four possible reasons:

• (a) it could point to a URL that returns a 4xx or 5xx error
• (b) the response could fail to include proper CORS headers
• (c) the server could take too long to respond and the @font-face declaration includes font-display: fallback
• (d) the file returned could be not a font file

Comment 1

[Razvan Caliman [:rcaliman]]

Hi James,

Thanks for filing this!

There is another bug open for this feature request: bug 1456844.
I have copied over the new information from this bug to the other one and I will close this one as a duplicate. Please add more context to that bug if you feel it is necessary.