--- a/browser/components/migration/MigrationUtils.jsm
+++ b/browser/components/migration/MigrationUtils.jsm
@@ -510,16 +510,17 @@ this.MigrationUtils = Object.freeze({
    * For the time being, the "internal name" of a migrator is its contract-id
    * trailer (e.g. ie for @mozilla.org/profile/migrator;1?app=browser&type=ie),
    * but it will soon be exposed properly.
    */
   getMigratorKeyForDefaultBrowser() {
     // Canary uses the same description as Chrome so we can't distinguish them.
     const APP_DESC_TO_KEY = {
       "Internet Explorer":                 "ie",
+      "Microsoft Edge":                    "edge",
       "Safari":                            "safari",
       "Firefox":                           "firefox",
       "Google Chrome":                     "chrome",  // Windows, Linux
       "Chrome":                            "chrome",  // OS X
       "Chromium":                          "chromium", // Windows, OS X
       "Chromium Web Browser":              "chromium", // Linux
       "360\u5b89\u5168\u6d4f\u89c8\u5668": "360se",
     };