Created attachment 73051 [details] screenshot showing wrong rendering under harfbuzz, as well as what it should look like Under latest harfbuzz-ng build, a Cham script leg is misplaced (see screenshot). A test page with embedded font is available here: http://khnews.info/cham/test2.html Could be a good candidate for the Ngapi HarfBuzz Hackfest :)
Thanks. That's on our radar (and indeed part of what I have scheduled for the hackfest). It's discussed here: https://bugzilla.mozilla.org/show_bug.cgi?id=827093
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.