diff -r 000000000000 -r 6474c204b198 gfx/cairo/premultiply-alpha-solid-gradients.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/cairo/premultiply-alpha-solid-gradients.patch	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+Fix single and multi-stop solid gradients by multiplying by the alpha component. r=roc
+
+This cairo commit that caused the problem: 2d790daa957471670f4ae0d3b22da89e4ee7111f.
+It was merged into mozilla-central with 1effb72d30cf
+
+diff --git a/gfx/cairo/cairo/src/cairo-pattern.c b/gfx/cairo/cairo/src/cairo-pattern.c
+--- a/gfx/cairo/cairo/src/cairo-pattern.c
++++ b/gfx/cairo/cairo/src/cairo-pattern.c
+@@ -2262,8 +2262,17 @@ _cairo_pattern_acquire_surface (const ca
+ 
+ 	    if (src->n_stops)
+ 	    {
++		cairo_color_t color;
++
++		/* multiply by alpha */
++		_cairo_color_init_rgba (&color,
++			src->stops->color.red,
++			src->stops->color.green,
++			src->stops->color.blue,
++			src->stops->color.alpha);
++
+ 		_cairo_pattern_init_solid (&solid,
+-					   &src->stops->color,
++					   &color,
+ 					   CAIRO_CONTENT_COLOR_ALPHA);
+ 	    }
+ 	    else
+@@ -2295,9 +2304,17 @@ _cairo_pattern_acquire_surface (const ca
+ 	    }
+ 	    if (i == src->n_stops) {
+ 		cairo_solid_pattern_t solid;
++		cairo_color_t color;
++
++		/* multiply by alpha */
++		_cairo_color_init_rgba (&color,
++			src->stops->color.red,
++			src->stops->color.green,
++			src->stops->color.blue,
++			src->stops->color.alpha);
+ 
+ 		_cairo_pattern_init_solid (&solid,
+-					   &src->stops->color,
++					   &color,
+ 					   CAIRO_CONTENT_COLOR_ALPHA);
+ 
+ 		status =