diff --git a/addon/webextension/icons/icon-128.png b/addon/webextension/icons/icon-128.png
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diff --git a/addon/webextension/icons/icon-16.png b/addon/webextension/icons/icon-16.png
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diff --git a/addon/webextension/icons/icon-19.png b/addon/webextension/icons/icon-19.png
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diff --git a/addon/webextension/icons/icon-256.png b/addon/webextension/icons/icon-256.png
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diff --git a/addon/webextension/icons/icon-32.png b/addon/webextension/icons/icon-32.png
deleted file mode 100644
index 8d1d5f77bc..0000000000
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diff --git a/addon/webextension/icons/icon-38.png b/addon/webextension/icons/icon-38.png
deleted file mode 100644
index 8c37139cf6..0000000000
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diff --git a/addon/webextension/icons/icon-48.png b/addon/webextension/icons/icon-48.png
deleted file mode 100644
index c96b2444f3..0000000000
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diff --git a/addon/webextension/icons/icon-64.png b/addon/webextension/icons/icon-64.png
deleted file mode 100644
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diff --git a/addon/webextension/manifest.json.template b/addon/webextension/manifest.json.template
index 35d498e83b..2e3439a7ac 100644
--- a/addon/webextension/manifest.json.template
+++ b/addon/webextension/manifest.json.template
@@ -11,14 +11,6 @@
     }
   },
   "default_locale": "en_US",
-  "icons": {
-    "16": "icons/icon-16.png",
-    "32": "icons/icon-32.png",
-    "48": "icons/icon-48.png",
-    "64": "icons/icon-64.png",
-    "128": "icons/icon-128.png",
-    "256": "icons/icon-256.png"
-  },
   "browser_action": {
     "default_icon": {
       "16": "icons/icon-16.svg",