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diff --git a/dom/quota/test/xpcshell/upgrades/test_upgradeStorageFrom2_1.js b/dom/quota/test/xpcshell/upgrades/test_upgradeStorageFrom2_1.js
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+++ b/dom/quota/test/xpcshell/upgrades/test_upgradeStorageFrom2_1.js
@@ -0,0 +1,85 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/**
+ * This test is mainly to verify UpgradeStorageFrom2_1To2_2 method (removal of
+ * obsolete origins, deprecated clients and unknown temporary files).
+ */
+
+async function testSteps() {
+  const filePaths = [
+    // Obsolete origins:
+    "storage/default/chrome+++content+browser.xul",
+
+    "storage/default/moz-safe-about+++home",
+
+    // TODO: These three origins don't belong here! They were added one release
+    //       later and the origin parser was fixed to handle these origins one
+    //       release later as well, so users which already upgraded to 2.2 may
+    //       still have issues related to these origins!
+    "storage/default/about+home+1",
+
+    "storage/default/about+home+1+q",
+
+    // about:reader?url=xxx (before bug 1422456)
+    "storage/default/about+reader+url=https%3A%2F%2Fexample.com",
+
+    // Deprecated client:
+    "storage/default/https+++example.com/asmjs",
+
+    // Unknown temporary file:
+    "storage/default/https+++example.com/idb/UUID123.tmp",
+  ];
+
+  const packages = [
+    // Storage used by FF 57-67 (storage version 2.1 with obsolete origins, a
+    // deprecated client and an unknown temporary file).
+    "version2_1_profile",
+    "../defaultStorageDirectory_shared",
+  ];
+
+  info("Clearing");
+
+  let request = clear();
+  await requestFinished(request);
+
+  info("Verifying storage");
+
+  verifyStorage(packages, "beforeInstall");
+
+  info("Installing packages");
+
+  installPackages(packages);
+
+  info("Verifying storage");
+
+  verifyStorage(packages, "afterInstall");
+
+  info("Checking files and directories before upgrade (storage version 2.1)");
+
+  for (const filePath of filePaths) {
+    let file = getRelativeFile(filePath);
+    let exists = file.exists();
+    ok(exists, "File or directory does exist");
+  }
+
+  info("Initializing");
+
+  // Initialize to trigger storage upgrade from version 2.1
+  request = init();
+  await requestFinished(request);
+
+  info("Verifying storage");
+
+  verifyStorage(packages, "afterInit");
+
+  info("Checking files and directories after upgrade");
+
+  for (const filePath of filePaths) {
+    let file = getRelativeFile(filePath);
+    let exists = file.exists();
+    ok(!exists, "File or directory does not exist");
+  }
+}