Bug 1588315 - Firefox Monitor link encodes emails to handle special characters. r=MattN

Differential Revision: https://phabricator.services.mozilla.com/D49300

--HG--
extra : moz-landing-system : lando

browser/components/protections/content/monitor-card.js

@@ -109,7 +109,9 @@ export default class MonitorClass {
    * @return URL to Monitor website.
    */
   buildMonitorUrl(email = null) {
-    return email ? `${MONITOR_SIGN_IN_URL}${email}` : MONITOR_URL;
+    return email
+      ? `${MONITOR_SIGN_IN_URL}${encodeURIComponent(email)}`
+      : MONITOR_URL;
   }
 
   renderContentForUserWithLogins(monitorData) {