diff --git a/toolkit/mozapps/extensions/test/browser/browser_bug523784.js b/toolkit/mozapps/extensions/test/browser/browser_bug523784.js
index c73125425570..dd6377a5cccc 100644
--- a/toolkit/mozapps/extensions/test/browser/browser_bug523784.js
+++ b/toolkit/mozapps/extensions/test/browser/browser_bug523784.js
@@ -11,7 +11,7 @@ var args = {
   list: [{
     name: "Bug 523784 softblocked addon",
     version: "1",
-    icon: "chrome://mozapps/skin/plugins/pluginGeneric.png",
+    icon: "chrome://mozapps/skin/plugins/pluginGeneric.svg",
     disable: false,
     blocked: false,
     url: "http://example.com/bug523784_1",
@@ -96,7 +96,7 @@ function bug523784_test2(win) {
   args.list.push({
     name: "Bug 523784 softblocked addon 2",
     version: "2",
-    icon: "chrome://mozapps/skin/plugins/pluginGeneric.png",
+    icon: "chrome://mozapps/skin/plugins/pluginGeneric.svg",
     disable: false,
     blocked: false,
     url: "http://example.com/bug523784_2"
@@ -104,7 +104,7 @@ function bug523784_test2(win) {
   args.list.push({
     name: "Bug 523784 softblocked addon 3",
     version: "4",
-    icon: "chrome://mozapps/skin/plugins/pluginGeneric.png",
+    icon: "chrome://mozapps/skin/plugins/pluginGeneric.svg",
     disable: false,
     blocked: false,
     url: "http://example.com/bug523784_3"
diff --git a/toolkit/themes/linux/mozapps/plugins/pluginGeneric-16.png b/toolkit/themes/linux/mozapps/plugins/pluginGeneric-16.png
deleted file mode 100644
index 34cabf8553d9..000000000000
Binary files a/toolkit/themes/linux/mozapps/plugins/pluginGeneric-16.png and /dev/null differ
diff --git a/toolkit/themes/linux/mozapps/plugins/pluginGeneric.png b/toolkit/themes/linux/mozapps/plugins/pluginGeneric.png
deleted file mode 100644
index d9aef96a2bdb..000000000000
Binary files a/toolkit/themes/linux/mozapps/plugins/pluginGeneric.png and /dev/null differ
diff --git a/toolkit/themes/osx/mozapps/plugins/pluginGeneric-16.png b/toolkit/themes/osx/mozapps/plugins/pluginGeneric-16.png
deleted file mode 100644
index 6956ffef8143..000000000000
Binary files a/toolkit/themes/osx/mozapps/plugins/pluginGeneric-16.png and /dev/null differ
diff --git a/toolkit/themes/osx/mozapps/plugins/pluginGeneric.png b/toolkit/themes/osx/mozapps/plugins/pluginGeneric.png
deleted file mode 100644
index 6ada1616bb12..000000000000
Binary files a/toolkit/themes/osx/mozapps/plugins/pluginGeneric.png and /dev/null differ
diff --git a/toolkit/themes/windows/mozapps/plugins/pluginGeneric-16.png b/toolkit/themes/windows/mozapps/plugins/pluginGeneric-16.png
deleted file mode 100644
index 5d796cc4c57d..000000000000
Binary files a/toolkit/themes/windows/mozapps/plugins/pluginGeneric-16.png and /dev/null differ
diff --git a/toolkit/themes/windows/mozapps/plugins/pluginGeneric.png b/toolkit/themes/windows/mozapps/plugins/pluginGeneric.png
deleted file mode 100644
index d8b270ae522b..000000000000
Binary files a/toolkit/themes/windows/mozapps/plugins/pluginGeneric.png and /dev/null differ
diff --git a/toolkit/themes/windows/mozapps/plugins/pluginInstallerWizard.css b/toolkit/themes/windows/mozapps/plugins/pluginInstallerWizard.css
deleted file mode 100644
index 2337ca1997dd..000000000000
--- a/toolkit/themes/windows/mozapps/plugins/pluginInstallerWizard.css
+++ /dev/null
@@ -1,12 +0,0 @@
-#licenseContainer, #pluginList {
-  -moz-appearance: listbox;
-  margin: 2px 4px;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  background-color: -moz-Field;
-  color: -moz-FieldText;
-}
-