Replace application/basilisk with browser/

browser/themes/shared/downloads/download-blocked.svg

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
+  <style>
+    circle {
+      fill: #D92215;
+    }
+    rect {
+      fill: #fff;
+    }
+  </style>
+
+  <circle cx="8" cy="8" r="8" />
+  <rect x="3" y="6" width="10" height="4" rx=".5" ry=".5" />
+</svg>