Closed Bug 689179 Opened 11 years ago Closed 11 years ago

The -moz-font-feature-settings contextual swash (cswh) is on by default


(Core :: Layout: Text and Fonts, defect)

Not set





(Reporter: braddunzer, Assigned: jfkthame)




(1 file)

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1

Steps to reproduce:

Used Adobe Calson Pro as a @font-face web font on a web page

Actual results:

The alternative capital swash is shown by default on the italic version of the font. However, by using the -moz-font-feature-settings: "cswh=0" the swash can be removed.

Expected results:

This should not be on by default. 
You can see a working example of this at
Update:: sorry that is contextual swash not capital swash
I can see that with Firefox 6 and older release builds (Fx 4+). Gecko 1.9.2 (Camino 2.1b2) doesn't show the issue.

The font fails to load on the most recent Aurora nightly build, though. The Error console logs an cryptic error message:
Error: downloadable font: download failed (font-family: "ACaslonPro_Italic" style:normal weight:normal stretch:normal src index:0): status=2147746065
Source Code:
@font-face {   font-family: "ACaslonPro_Italic";   font-style: normal;   font-weight: normal;   src: url(""); }
Component: General → Layout: Text
Ever confirmed: true
Product: Firefox → Core
QA Contact: general → layout.fonts-and-text
Correct the font is served from our WebINK servers and uses user-agent sniffing to hand down the correct font and Nightly builds will not work with our service.

Do I need to provide another sample page
Yes, I pointed this out to Behdad and it's already fixed upstream:

Jonathan, would it make sense to consider updating harfbuzz code after the sync tomorrow?
Summary: The -moz-font-feature-settings capital swash or cswh is on by default → The -moz-font-feature-settings contextual swash (cswh) is on by default
This just removes 'cswh' from the default features.

Yes, we'll want to take a full HB update sometime soon, but that will involve a bunch of work (there are significant API changes), so let's do this as an interim fix for the specific issue here.
Assignee: nobody → jfkthame
Attachment #562683 - Flags: review?(jdaggett)
Attachment #562683 - Flags: review?(jdaggett) → review+
Closed: 11 years ago
Resolution: --- → FIXED
Thanks for the quick work everyone. I look forward to seeing this show up in a build soon

Blocks: 665939
Jonathan, you should have added cswh to Arabic when removing from generic shaper.  Not a huge deal if you're going to rebase soon anyway.
You're right - but let's see if we can get bug 695857 landed this month, which will supersede all this.
You need to log in before you can comment on or make changes to this bug.