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diff --git a/layout/reftests/fonts/math/README b/layout/reftests/fonts/math/README
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+The fonts in this directory are autogenerated with FontForge using the Python
+script generate.py. See the comments in that file for more information on how
+to run the script.
+
+These fonts are intended to test the The MATH table and OpenType Features used
+in MathML. See layout/reftests/mathml/ and layout/mathml/tests.
diff --git a/layout/reftests/fonts/math/axis-height-1.otf b/layout/reftests/fonts/math/axis-height-1.otf
new file mode 100644
index 0000000000..2d6cc2fa0a
--- /dev/null
+++ b/layout/reftests/fonts/math/axis-height-1.otf
diff --git a/layout/reftests/fonts/math/axis-height-2.otf b/layout/reftests/fonts/math/axis-height-2.otf
new file mode 100644
index 0000000000..fdb7c97ce0
--- /dev/null
+++ b/layout/reftests/fonts/math/axis-height-2.otf
diff --git a/layout/reftests/fonts/math/dtls-1.otf b/layout/reftests/fonts/math/dtls-1.otf
new file mode 100644
index 0000000000..1ffbe24427
--- /dev/null
+++ b/layout/reftests/fonts/math/dtls-1.otf
diff --git a/layout/reftests/fonts/math/fraction-1.otf b/layout/reftests/fonts/math/fraction-1.otf
new file mode 100644
index 0000000000..24e7d5155b
--- /dev/null
+++ b/layout/reftests/fonts/math/fraction-1.otf
diff --git a/layout/reftests/fonts/math/generate.py b/layout/reftests/fonts/math/generate.py
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+++ b/layout/reftests/fonts/math/generate.py
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+#!/usr/bin/python
+# vim: set shiftwidth=4 tabstop=8 autoindent expandtab:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# For general fontforge documentation, see:
+#   http://fontforge.sourceforge.net/
+# For fontforge scripting documentation, see:
+#   http://fontforge.sourceforge.net/scripting-tutorial.html
+#   http://fontforge.sourceforge.net/scripting.html
+# and most importantly:
+#   http://fontforge.sourceforge.net/python.html
+
+# To install what you need, on Ubuntu,
+#   sudo apt-get install python-fontforge
+
+from __future__ import print_function, absolute_import
+import fontforge
+
+em = 1000
+
+
+def newMathFont(aName):
+    print("Generating %s.otf..." % aName, end="")
+    mathFont = fontforge.font()
+    mathFont.fontname = aName
+    mathFont.familyname = aName
+    mathFont.fullname = aName
+    mathFont.copyright = "Copyright (c) 2014 Mozilla Corporation"
+    mathFont.encoding = "UnicodeFull"
+
+    # Create a space character. Also force the creation of some MATH subtables
+    # so that OTS will not reject the MATH table.
+    g = mathFont.createChar(ord(" "), "space")
+    g.width = em
+    g.italicCorrection = 0
+    g.topaccent = 0
+    g.mathKern.bottomLeft = tuple([(0, 0)])
+    g.mathKern.bottomRight = tuple([(0, 0)])
+    g.mathKern.topLeft = tuple([(0, 0)])
+    g.mathKern.topRight = tuple([(0, 0)])
+    mathFont[ord(" ")].horizontalVariants = "space"
+    mathFont[ord(" ")].verticalVariants = "space"
+    return mathFont
+
+
+def saveMathFont(aFont):
+    aFont.em = em
+    aFont.ascent = aFont.descent = em / 2
+    aFont.hhea_ascent = aFont.os2_typoascent = aFont.os2_winascent = em / 2
+    aFont.descent = aFont.hhea_descent = em / 2
+    aFont.os2_typodescent = aFont.os2_windescent = em / 2
+    aFont.hhea_ascent_add = aFont.hhea_descent_add = 0
+    aFont.os2_typoascent_add = aFont.os2_typodescent_add = 0
+    aFont.os2_winascent_add = aFont.os2_windescent_add = 0
+    aFont.os2_use_typo_metrics = True
+    aFont.generate(aFont.fontname + ".otf")
+    print(" done.")
+
+
+def createSquareGlyph(aFont, aCodePoint):
+    g = aFont.createChar(aCodePoint)
+    p = g.glyphPen()
+    p.moveTo(0, 0)
+    p.lineTo(em, 0)
+    p.lineTo(em, em)
+    p.lineTo(0, em)
+    p.closePath()
+
+
+def createLLTriangleGlyph(aFont, aCodePoint):
+    g = aFont.createChar(aCodePoint)
+    p = g.glyphPen()
+    p.moveTo(0, 0)
+    p.lineTo(em, 0)
+    p.lineTo(0, em)
+    p.closePath()
+
+
+def createURTriangleGlyph(aFont, aCodePoint):
+    g = aFont.createChar(aCodePoint)
+    p = g.glyphPen()
+    p.moveTo(em, 0)
+    p.lineTo(em, em)
+    p.lineTo(0, em)
+    p.closePath()
+
+
+def createDiamondGlyph(aFont, aCodePoint):
+    g = aFont.createChar(aCodePoint)
+    p = g.glyphPen()
+    p.moveTo(0, em / 2)
+    p.lineTo(em / 2, 0)
+    p.lineTo(em, em / 2)
+    p.lineTo(em / 2, em)
+    p.closePath()
+
+
+################################################################################
+# Glyph variants and constructions
+f = newMathFont("stretchy")
+nvariants = 3
+
+# Draw boxes for the size variants and glues
+for i in range(0, nvariants):
+    s = em * (i + 1)
+
+    g = f.createChar(-1, "h%d" % i)
+    p = g.glyphPen()
+    p.moveTo(0, -em)
+    p.lineTo(0, em)
+    p.lineTo(s, em)
+    p.lineTo(s, -em)
+    p.closePath()
+    g.width = s
+
+    g = f.createChar(-1, "v%d" % i)
+    p = g.glyphPen()
+    p.moveTo(0, 0)
+    p.lineTo(0, s)
+    p.lineTo(2 * em, s)
+    p.lineTo(2 * em, 0)
+    p.closePath()
+    g.width = 2 * em
+
+# Draw some pieces for stretchy operators
+s = em * nvariants
+
+g = f.createChar(-1, "left")
+p = g.glyphPen()
+p.moveTo(0, -2 * em)
+p.lineTo(0, 2 * em)
+p.lineTo(s, em)
+p.lineTo(s, -em)
+p.closePath()
+g.width = s
+
+g = f.createChar(-1, "right")
+p = g.glyphPen()
+p.moveTo(0, -em)
+p.lineTo(0, em)
+p.lineTo(s, 2 * em)
+p.lineTo(s, -2 * em)
+p.closePath()
+g.width = s
+
+g = f.createChar(-1, "hmid")
+p = g.glyphPen()
+p.moveTo(0, -em)
+p.lineTo(0, em)
+p.lineTo(s, 2 * em)
+p.lineTo(2 * s, em)
+p.lineTo(2 * s, -em)
+p.lineTo(s, -2 * em)
+p.closePath()
+g.width = 2 * s
+
+g = f.createChar(-1, "bottom")
+p = g.glyphPen()
+p.moveTo(0, 0)
+p.lineTo(0, s)
+p.lineTo(2 * em, s)
+p.lineTo(4 * em, 0)
+p.closePath()
+g.width = 4 * em
+
+g = f.createChar(-1, "top")
+p = g.glyphPen()
+p.moveTo(0, 0)
+p.lineTo(4 * em, 0)
+p.lineTo(2 * em, -s)
+p.lineTo(0, -s)
+p.closePath()
+g.width = 4 * em
+
+g = f.createChar(-1, "vmid")
+p = g.glyphPen()
+p.moveTo(0, s)
+p.lineTo(2 * em, s)
+p.lineTo(4 * em, 0)
+p.lineTo(2 * em, -s)
+p.lineTo(0, -s)
+p.closePath()
+g.width = 3 * em
+
+# Create small rectangle of various size for some exotic arrows that are
+# unlikely to be stretchable with standard fonts.
+hstretchy = [
+    0x219C,  # leftwards wave arrow
+    0x219D,  # rightwards wave arrow
+    0x219E,  # leftwards two headed arrow
+    0x21A0,  # rightwards two headed arrow
+    0x21A2,  # leftwards arrow with tail
+]
+vstretchy = [
+    0x219F,  # upwards two headed arrow
+    0x21A1,  # downwards two headed arrow
+    0x21A5,  # upwards arrow from bar
+    0x21A7,  # downwards arrow from bar
+    0x21A8,  # up down arrow with base
+]
+for i in range(0, 1 + nvariants + 1):
+    s = (i + 1) * em / 10
+
+    g = f.createChar(hstretchy[i])
+    p = g.glyphPen()
+    p.moveTo(0, -em / 10)
+    p.lineTo(0, em / 10)
+    p.lineTo(s, em / 10)
+    p.lineTo(s, -em / 10)
+    p.closePath()
+    g.width = s
+
+    g = f.createChar(vstretchy[i])
+    p = g.glyphPen()
+    p.moveTo(0, 0)
+    p.lineTo(0, s)
+    p.lineTo(2 * em / 10, s)
+    p.lineTo(2 * em / 10, 0)
+    p.closePath()
+    g.width = 2 * em / 10
+
+# hstretchy[0] and vstretchy[0] have all the variants and the components. The others only have one of them.
+s = em * nvariants
+
+f[hstretchy[0]].horizontalVariants = "uni219C h0 h1 h2"
+f[hstretchy[0]].horizontalComponents = (
+    ("left", False, 0, 0, s),
+    ("h2", True, 0, 0, s),
+    ("hmid", False, 0, 0, 2 * s),
+    ("h2", True, 0, 0, s),
+    ("right", False, 0, 0, s),
+)
+
+f[hstretchy[1]].horizontalVariants = "uni219D h0"
+f[hstretchy[2]].horizontalVariants = "uni219E h1"
+f[hstretchy[3]].horizontalVariants = "uni21A0 h2"
+f[hstretchy[4]].horizontalVariants = "uni21A2 h2"
+f[hstretchy[4]].horizontalComponents = f[hstretchy[0]].horizontalComponents
+
+f[vstretchy[0]].verticalVariants = "uni219F v0 v1 v2"
+f[vstretchy[0]].verticalComponents = (
+    ("bottom", False, 0, 0, s),
+    ("v2", True, 0, 0, s),
+    ("vmid", False, 0, 0, 2 * s),
+    ("v2", True, 0, 0, s),
+    ("top", False, 0, 0, s),
+)
+
+f[vstretchy[1]].verticalVariants = "uni21A1 v0"
+f[vstretchy[2]].verticalVariants = "uni21A5 v1"
+f[vstretchy[3]].verticalVariants = "uni21A7 v2"
+f[vstretchy[4]].verticalVariants = "uni21A8"
+f[vstretchy[4]].verticalComponents = f[vstretchy[0]].verticalComponents
+
+################################################################################
+# Testing DisplayOperatorMinHeight
+f.math.DisplayOperatorMinHeight = 8 * em
+largeop = [0x2A1B, 0x2A1C]  # integral with overbar/underbar
+
+# Draw boxes of size 1, 2, 7, 8, 9em.
+for i in [1, 2, 7, 8, 9]:
+    s = em * i
+    if i == 1 or i == 2:
+        g = f.createChar(largeop[i - 1])
+    else:
+        g = f.createChar(-1, "L%d" % i)
+    p = g.glyphPen()
+    p.moveTo(0, 0)
+    p.lineTo(0, s)
+    p.lineTo(s, s)
+    p.lineTo(s, 0)
+    p.closePath()
+    g.width = s
+
+f[largeop[0]].verticalVariants = "uni2A1B L7 L8 L9"
+f[largeop[1]].verticalVariants = "uni2A1C L8"
+
+saveMathFont(f)
+
+################################################################################
+# Testing AxisHeight
+f = newMathFont("axis-height-1")
+f.math.AxisHeight = 0
+createSquareGlyph(f, ord("+"))
+saveMathFont(f)
+
+f = newMathFont("axis-height-2")
+f.math.AxisHeight = 20 * em
+createSquareGlyph(f, ord("+"))
+saveMathFont(f)
+
+################################################################################
+# Testing Fraction Parameters
+f = newMathFont("fraction-1")
+f.math.FractionRuleThickness = 20 * em
+f.math.FractionNumeratorShiftUp = 0
+f.math.FractionNumeratorDisplayStyleShiftUp = 0
+f.math.FractionDenominatorShiftDown = 0
+f.math.FractionNumeratorGapMin = 0
+f.math.FractionDenominatorGapMin = 0
+f.math.FractionNumeratorDisplayStyleShiftUp = 0
+f.math.FractionDenominatorDisplayStyleShiftDown = 0
+f.math.FractionNumeratorDisplayStyleGapMin = 0
+f.math.FractionDenominatorDisplayStyleGapMin = 0
+saveMathFont(f)
+
+################################################################################
+# Testing Limits Parameters
+f = newMathFont("limits-5")
+f.math.UpperLimitGapMin = 0
+f.math.UpperLimitBaselineRiseMin = 0
+f.math.LowerLimitGapMin = 0
+f.math.LowerLimitBaselineDropMin = 0
+f.math.AccentBaseHeight = 6 * em
+f.math.FlattenedAccentBaseHeight = 3 * em
+createSquareGlyph(f, ord("~"))
+saveMathFont(f)
+
+f = newMathFont("dtls-1")
+createSquareGlyph(f, ord("a"))
+createLLTriangleGlyph(f, ord("b"))
+createSquareGlyph(f, ord("c"))
+createDiamondGlyph(f, 0x1D51E)  # mathvariant=fraktur a
+createURTriangleGlyph(f, 0x1D51F)  # mathvariant=fraktur b
+createDiamondGlyph(f, 0x1D520)  # mathvariant=fraktur c
+f.addLookup("gsub", "gsub_single", (), (("dtls", (("latn", ("dflt")),)),))
+f.addLookupSubtable("gsub", "gsub_n")
+glyph = f["a"]
+glyph.addPosSub("gsub_n", "b")
+glyph2 = f[0x1D51F]
+glyph2.glyphname = "urtriangle"
+glyph3 = f[0x1D51E]
+glyph3.addPosSub("gsub_n", "urtriangle")
+saveMathFont(f)
diff --git a/layout/reftests/fonts/math/limits-5.otf b/layout/reftests/fonts/math/limits-5.otf
new file mode 100644
index 0000000000..fb8e9ec4fc
--- /dev/null
+++ b/layout/reftests/fonts/math/limits-5.otf
diff --git a/layout/reftests/fonts/math/stretchy.otf b/layout/reftests/fonts/math/stretchy.otf
new file mode 100644
index 0000000000..f192de3463
--- /dev/null
+++ b/layout/reftests/fonts/math/stretchy.otf