Add selection colour for Mozilla Firefox

Defines the highlight colour when selecting slide content using Mozilla
Firefox to match other browsers, instead of being the default colour.

css/theme/beige.css

@@ -29,6 +29,11 @@ body {
   background: rgba(79, 64, 28, 0.99);
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: rgba(79, 64, 28, 0.99);
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/black.css

@@ -25,6 +25,11 @@ body {
   background: #bee4fd;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #bee4fd;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/blood.css

@@ -28,6 +28,11 @@ body {
   background: #a23;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #a23;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/league.css

@@ -31,6 +31,11 @@ body {
   background: #FF5E99;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #FF5E99;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/moon.css

@@ -29,6 +29,11 @@ body {
   background: #d33682;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/night.css

@@ -23,6 +23,11 @@ body {
   background: #e7ad52;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #e7ad52;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/serif.css

@@ -25,6 +25,11 @@ body {
   background: #26351C;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #26351C;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/simple.css

@@ -25,6 +25,11 @@ body {
   background: rgba(0, 0, 0, 0.99);
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: rgba(0, 0, 0, 0.99);
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/sky.css

@@ -32,6 +32,11 @@ body {
   background: #134674;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #134674;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/solarized.css

@@ -29,6 +29,11 @@ body {
   background: #d33682;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;

css/theme/white.css

@@ -25,6 +25,11 @@ body {
   background: #98bdef;
   text-shadow: none; }
 
+::-moz-selection {
+  color: #fff;
+  background: #98bdef;
+  text-shadow: none; }
+
 .reveal .slides > section,
 .reveal .slides > section > section {
   line-height: 1.3;