diff --git a/widget/nsBaseClipboard.cpp b/widget/nsBaseClipboard.cpp
index 4fdc1a2cd857..333d154e70b6 100644
--- a/widget/nsBaseClipboard.cpp
+++ b/widget/nsBaseClipboard.cpp
@@ -840,8 +840,8 @@ nsBaseClipboard::MaybeCreateGetRequestFromClipboardCache(
   }
 
   nsTArray<nsCString> results;
-  for (const auto& transferableFlavor : transferableFlavors) {
-    for (const auto& flavor : aFlavorList) {
+  for (const auto& flavor : aFlavorList) {
+    for (const auto& transferableFlavor : transferableFlavors) {
       // XXX We need special check for image as we always put the
       // image as "native" on the clipboard.
       if (transferableFlavor.Equals(flavor) ||
diff --git a/widget/tests/clipboard_helper.js b/widget/tests/clipboard_helper.js
index 0ba2f351825f..76ed2aeb378a 100644
--- a/widget/tests/clipboard_helper.js
+++ b/widget/tests/clipboard_helper.js
@@ -164,11 +164,14 @@ function getClipboardDataSnapshotSync(aClipboardType) {
   );
 }
 
-function asyncGetClipboardData(aClipboardType) {
+function asyncGetClipboardData(
+  aClipboardType,
+  aFormats = ["text/plain", "text/html", "image/png"]
+) {
   return new Promise((resolve, reject) => {
     try {
       clipboard.asyncGetData(
-        ["text/plain", "text/html", "image/png"],
+        aFormats,
         aClipboardType,
         null,
         SpecialPowers.Services.scriptSecurityManager.getSystemPrincipal(),
diff --git a/widget/tests/test_clipboard_cache_chrome.html b/widget/tests/test_clipboard_cache_chrome.html
index e08024ab0347..81d7a652b68d 100644
--- a/widget/tests/test_clipboard_cache_chrome.html
+++ b/widget/tests/test_clipboard_cache_chrome.html
@@ -232,6 +232,33 @@ function runClipboardCacheTests(aIsSupportGetFromCachedTransferable) {
       await testClipboardData(await asyncGetClipboardData(type), clipboardData);
     });
 
+    add_task(async function test_flavorList_order() {
+      info(`test_flavorList_order with pref ` +
+           `${aIsSupportGetFromCachedTransferable ? "enabled" : "disabled"}`);
+
+      const trans = generateNewTransferable("text/plain", generateRandomString());
+      addStringToTransferable("text/html", `<div>${generateRandomString()}</div>`, trans);
+
+      info(`Writedata to clipboard ${type}`);
+      clipboard.setData(trans, null, type);
+
+      // Read with reverse order.
+      let flavors = trans.flavorsTransferableCanExport().reverse();
+      let request = await asyncGetClipboardData(type, flavors);
+      // XXX Not all clipboard type supports html format, e.g. kFindClipboard
+      // on macOS only support writing text/plain.
+      if (
+        navigator.platform.includes("Mac") &&
+        type == clipboard.kFindClipboard &&
+        !aIsSupportGetFromCachedTransferable &&
+        !SpecialPowers.isHeadless
+      ) {
+        isDeeply(request.flavorList, ["text/plain"], "check flavor orders");
+      } else {
+        isDeeply(request.flavorList, flavors, "check flavor orders");
+      }
+    });
+
     // Test sync set clipboard data.
     testClipboardCache(type, false, aIsSupportGetFromCachedTransferable);