--- a/layout/reftests/margin-collapsing/reftest.list
+++ b/layout/reftests/margin-collapsing/reftest.list
@@ -8,52 +8,52 @@
 # inline- and block series.
 # "Horizontal margins never collapse."
 # Horizontal margins of inline boxes do not collapse.
 # The norefs for these tests depict margins that incorrectly collapsed.
 == inline-horizontal-1.html inline-horizontal-1-ref.html
 != inline-horizontal-1.html inline-horizontal-1-noref.html
 == inline-horizontal-2.html inline-horizontal-2-ref.html
 != inline-horizontal-2.html inline-horizontal-2-noref.html
-skip-if(B2G||Mulet) == inline-horizontal-1-dyn.html inline-horizontal-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== inline-horizontal-1-dyn.html inline-horizontal-1-ref.html
 != inline-horizontal-1-dyn.html inline-horizontal-1-noref.html
-skip-if(B2G||Mulet) == inline-horizontal-2-dyn.html inline-horizontal-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== inline-horizontal-2-dyn.html inline-horizontal-2-ref.html
 != inline-horizontal-2-dyn.html inline-horizontal-2-noref.html
 # Horizontal margins of block boxes do not collapse.
 # These block boxes are actually floats - in CSS 2.1 there is no other
 # method to create horizontally adjacent block boxes.
 == block-horizontal-1.html block-horizontal-1-ref.html
 != block-horizontal-1.html block-horizontal-1-noref.html
 == block-horizontal-2.html block-horizontal-2-ref.html
 != block-horizontal-2.html block-horizontal-2-noref.html
 == block-horizontal-3.html block-horizontal-3-ref.html
 != block-horizontal-3.html block-horizontal-3-noref.html
 == block-horizontal-4.html block-horizontal-4-ref.html
 != block-horizontal-4.html block-horizontal-4-noref.html
-skip-if(B2G||Mulet) == block-horizontal-1-dyn.html block-horizontal-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== block-horizontal-1-dyn.html block-horizontal-1-ref.html
 != block-horizontal-1-dyn.html block-horizontal-1-noref.html
-skip-if(B2G||Mulet) == block-horizontal-2-dyn.html block-horizontal-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== block-horizontal-2-dyn.html block-horizontal-2-ref.html
 != block-horizontal-2-dyn.html block-horizontal-2-noref.html
-skip-if(B2G||Mulet) == block-horizontal-3-dyn.html block-horizontal-3-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== block-horizontal-3-dyn.html block-horizontal-3-ref.html
 != block-horizontal-3-dyn.html block-horizontal-3-noref.html
-skip-if(B2G||Mulet) == block-horizontal-4-dyn.html block-horizontal-4-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== block-horizontal-4-dyn.html block-horizontal-4-ref.html
 != block-horizontal-4-dyn.html block-horizontal-4-noref.html
 # Horizontal margins of inline-block boxes do not collapse.
 == inline-block-horizontal-1.html inline-block-horizontal-1-ref.html
 != inline-block-horizontal-1.html inline-block-horizontal-1-noref.html
 == inline-block-horizontal-2.html inline-block-horizontal-2-ref.html
 != inline-block-horizontal-2.html inline-block-horizontal-2-noref.html
-skip-if(B2G||Mulet) == inline-block-horizontal-1-dyn.html inline-block-horizontal-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== inline-block-horizontal-1-dyn.html inline-block-horizontal-1-ref.html
 != inline-block-horizontal-1-dyn.html inline-block-horizontal-1-noref.html
-skip-if(B2G||Mulet) == inline-block-horizontal-2-dyn.html inline-block-horizontal-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== inline-block-horizontal-2-dyn.html inline-block-horizontal-2-ref.html
 != inline-block-horizontal-2-dyn.html inline-block-horizontal-2-noref.html
 # Horizontal margins of inline-tables do not collapse.
 == inline-table-horizontal-1.html inline-table-horizontal-1-ref.html
 != inline-table-horizontal-1.html inline-table-horizontal-1-noref.html
-skip-if(B2G||Mulet) == inline-table-horizontal-1-dyn.html inline-table-horizontal-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== inline-table-horizontal-1-dyn.html inline-table-horizontal-1-ref.html
 != inline-table-horizontal-1-dyn.html inline-table-horizontal-1-noref.html
 # "In CSS, the adjoining margins of two or more boxes
 #  (which might or might not be siblings) can combine to form a single margin.
 #  Margins that combine this way are said to collapse,
 #  and the resulting combined margin is called a collapsed margin."
 # "Two margins are adjoining if and only if:" [...]
 # "both belong to vertically-adjacent box edges,
 #  i.e. form one of the following pairs:" [...]
@@ -82,17 +82,17 @@ skip-if(B2G||Mulet) == inline-table-hori
 == block-sibling-1a-dyn.html block-sibling-1-ref2.html
 != block-sibling-1a-dyn.html block-sibling-1-noref.html
 == block-sibling-1b-dyn.html block-sibling-1-ref.html
 == block-sibling-1b-dyn.html block-sibling-1-ref2.html
 != block-sibling-1b-dyn.html block-sibling-1-noref.html
 == block-sibling-1c-dyn.html block-sibling-1-ref.html
 == block-sibling-1c-dyn.html block-sibling-1-ref2.html
 != block-sibling-1c-dyn.html block-sibling-1-noref2.html
-skip-if(B2G||Mulet) == block-sibling-2-dyn.html block-sibling-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== block-sibling-2-dyn.html block-sibling-2-ref.html
 == block-sibling-2-dyn.html block-sibling-2-ref2.html
 != block-sibling-2-dyn.html block-sibling-2-noref.html
 == block-sibling-3-dyn.html block-sibling-1-ref.html
 == block-sibling-3-dyn.html block-sibling-1-ref2.html
 != block-sibling-3-dyn.html block-sibling-1-noref.html
 # "In the case of negative margins, the maximum of the absolute values of the
 #  negative adjoining margins is deducted from the maximum of the positive
 #  adjoining margins. If there are no positive margins, the maximum of the
@@ -570,32 +570,32 @@ fails == block-max-height-last-child-9a-
 # The margins of a block formatting context can collapse with margins of
 # in-flow sibling boxes, but not with margins of their in-flow children.
 # Elements that establish a block formatting context are:
 # * "elements with 'overflow' other than 'visible'"
 == block-overflow-1.html block-overflow-1-ref.html
 == block-overflow-1.html block-overflow-1-ref2.html
 == block-overflow-2.html block-overflow-2-ref.html
 == block-overflow-2.html block-overflow-2-ref2.html
-skip-if(B2G||Mulet) == block-overflow-3.html block-overflow-3-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
-skip-if(B2G||Mulet) == block-overflow-3.html block-overflow-3-ref2.html # Initial mulet triage: parity with B2G/B2G Desktop
-skip-if(B2G||Mulet) == block-overflow-4.html block-overflow-4-ref.html # Initial mulet triage: parity with B2G/B2G Desktop
-skip-if(B2G||Mulet) == block-overflow-4.html block-overflow-4-ref2.html # Initial mulet triage: parity with B2G/B2G Desktop
+== block-overflow-3.html block-overflow-3-ref.html
+== block-overflow-3.html block-overflow-3-ref2.html
+== block-overflow-4.html block-overflow-4-ref.html
+== block-overflow-4.html block-overflow-4-ref2.html
 == block-overflow-5a.html block-overflow-5-ref.html
 == block-overflow-5a.html block-overflow-5-ref2.html
 == block-overflow-5b.html block-overflow-5-ref.html
 == block-overflow-5b.html block-overflow-5-ref2.html
 == block-overflow-5c.html block-overflow-5c-ref.html
 == block-overflow-5c.html block-overflow-5c-ref2.html
 == block-overflow-5d.html block-overflow-5-ref.html
 == block-overflow-5d.html block-overflow-5-ref2.html
 == block-overflow-1-dyn.html block-overflow-1-ref2.html
 == block-overflow-2-dyn.html block-overflow-2-ref2.html
-skip-if(B2G||Mulet) == block-overflow-3-dyn.html block-overflow-3-ref2.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
-skip-if(B2G||Mulet) == block-overflow-4-dyn.html block-overflow-4-ref2.html # Initial mulet triage: parity with B2G/B2G Desktop
+== block-overflow-3-dyn.html block-overflow-3-ref2.html
+== block-overflow-4-dyn.html block-overflow-4-ref2.html
 == block-overflow-5a-dyn.html block-overflow-5-ref2.html
 == block-overflow-5b-dyn.html block-overflow-5-ref2.html
 == block-overflow-5c-dyn.html block-overflow-5c-ref2.html
 == block-overflow-5d-dyn.html block-overflow-5-ref2.html
 # * 'fieldset' elements, per HTML5 (Candidate Recommendation 6 August 2013):
 # §10.3.13 (The fieldset and legend elements): "The fieldset element is
 # expected to establish a new block formatting context."
 == fieldset-sibling-1a.html fieldset-sibling-1-ref.html
@@ -625,29 +625,29 @@ skip-if(B2G||Mulet) == block-overflow-4-
 == table-sibling-1c.html table-sibling-1-ref.html
 != table-sibling-1c.html table-sibling-1-noref2.html
 == table-sibling-2a.html table-sibling-2-ref.html
 != table-sibling-2a.html table-sibling-2-noref.html
 == table-sibling-2b.html table-sibling-2-ref.html
 != table-sibling-2b.html table-sibling-2-noref.html
 == table-sibling-2c.html table-sibling-2-ref.html
 != table-sibling-2c.html table-sibling-2-noref2.html
-skip-if(B2G||Mulet) == table-sibling-1a-dyn.html table-sibling-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-1a-dyn.html table-sibling-1-ref.html
 != table-sibling-1a-dyn.html table-sibling-1-noref.html
-skip-if(B2G||Mulet) == table-sibling-1b-dyn.html table-sibling-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-1b-dyn.html table-sibling-1-ref.html
 != table-sibling-1b-dyn.html table-sibling-1-noref.html
-skip-if(B2G||Mulet) == table-sibling-1c-dyn.html table-sibling-1-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-1c-dyn.html table-sibling-1-ref.html
 != table-sibling-1c-dyn.html table-sibling-1-noref2.html
-skip-if(B2G||Mulet) == table-sibling-2a-dyn.html table-sibling-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-2a-dyn.html table-sibling-2-ref.html
 != table-sibling-2a-dyn.html table-sibling-2-noref.html
-skip-if(B2G||Mulet) == table-sibling-2b-dyn.html table-sibling-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-2b-dyn.html table-sibling-2-ref.html
 != table-sibling-2b-dyn.html table-sibling-2-noref.html
-skip-if(B2G||Mulet) == table-sibling-2c-dyn.html table-sibling-2-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-2c-dyn.html table-sibling-2-ref.html
 != table-sibling-2c-dyn.html table-sibling-2-noref2.html
-skip-if(B2G||Mulet) == table-sibling-3-dyn.html table-sibling-3-ref.html # bug 773482 # Initial mulet triage: parity with B2G/B2G Desktop
+== table-sibling-3-dyn.html table-sibling-3-ref.html
 != table-sibling-3-dyn.html table-sibling-3-noref.html
 # * table-caption boxes, per CSS 2.1 §9.4.1 (Block formatting contexts):
 # "[...] block containers (such as [...] table-captions) [...]
 #  establish new block formatting contexts for their contents."
 # The margins of a table-caption do not collapse with the margins
 # of the table wrapper box. They can collapse with the margins of other
 # table-captions, though, if they share the same caption-side.
 == table-caption-1a.html table-caption-1-ref.html