Some arguments need to be optional

src/ext/lib/Settings.ts

@@ -390,7 +390,7 @@ class Settings {
     return this.active.actions;
   }
 
-  getExtensionMode(site) {
+  getExtensionMode(site?: string) {
     if (!site) {
       site = window.location.hostname;
 

src/ext/lib/video-data/PageInfo.ts

@@ -505,7 +505,7 @@ class PageInfo {
     }
   }
 
-  restoreAr(playingOnly) {
+  restoreAr(playingOnly?: boolean) {
     if (playingOnly) {
       for(let vd of this.videos){
         if (vd.isPlaying()) {