Comment 101 for bug 37828

(In reply to comment #18)
> The screenshots given with the original report shows as if the font maker
> forgot to adjust the Advance Width if the ligature glyph leaving it at the
> width used by the first letter of the combination. If this theory is
> correct, there is nothing that Mozilla should do.

It's already determined long ago that the bug was in Mozilla, and it has been fixed in Firefox 3.0.