Fixes issues with firefox and safari.

ts/a11y/explorer/KeyExplorer.ts

@@ -204,6 +204,9 @@ export class SpeechExplorer extends AbstractExplorer<string> implements KeyExplo
    * @override
    */
   public FocusOut(_event: FocusEvent) {
+    // This guard is to FF and Safari, where focus in fires only once on
+    // keyboard.
+    if (!this.active) return;
     this.generators.CleanUp(this.current);
     if (!this.move) {
       this.Stop();

ts/a11y/explorer/Region.ts

@@ -417,6 +417,12 @@ export class SpeechRegion extends LiveRegion {
       setTimeout(() => {
         if (this.voiceRequest) {
           resolve(true);
+        } else {
+          // This case is to make FF and Safari work.
+          setTimeout(() => {
+            this.voiceRequest = true;
+            resolve(true);
+          }, 100);
         }
       }, 100);
     });