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.
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.