diff --git a/extensions/b2g/images/div_line_left@1.5x.png b/extensions/b2g/images/div_line_left@1.5x.png
new file mode 100644
index 000000000..8ef8a85c2
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diff --git a/extensions/b2g/images/div_line_right@1.5x.png b/extensions/b2g/images/div_line_right@1.5x.png
new file mode 100644
index 000000000..3f4aa7f96
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diff --git a/extensions/b2g/images/icon_next_page@1.5x.png b/extensions/b2g/images/icon_next_page@1.5x.png
new file mode 100644
index 000000000..ad75940c4
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diff --git a/extensions/b2g/images/icon_previous_page@1.5x.png b/extensions/b2g/images/icon_previous_page@1.5x.png
new file mode 100644
index 000000000..fbc7d4dfd
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diff --git a/extensions/b2g/images/icon_zoom_in@1.5x.png b/extensions/b2g/images/icon_zoom_in@1.5x.png
new file mode 100644
index 000000000..a43a2b64b
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diff --git a/extensions/b2g/images/icon_zoom_out@1.5x.png b/extensions/b2g/images/icon_zoom_out@1.5x.png
new file mode 100644
index 000000000..6aa2433b6
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diff --git a/extensions/b2g/viewer.css b/extensions/b2g/viewer.css
index c4486d399..52f3b8478 100644
--- a/extensions/b2g/viewer.css
+++ b/extensions/b2g/viewer.css
@@ -103,6 +103,7 @@ footer {
   background-image: url(images/div_line_left.png), url(images/div_line_right.png);
   background-repeat: no-repeat;
   background-position: left, right;
+  background-size: 0.2rem, 0.2rem;
 }
 
 .toolbarButton.zoomOut {