fix(FEC-9118): External caption doesn't display (#243)

UA of webos v.2 is fake to safari, added check for mac os to prevent this fake.
LG check is added to UAParser.

src/common/utils/setup-helpers.js

@@ -286,7 +286,7 @@ function checkNativeHlsSupport(options: KPOptionsObject): void {
  * @returns {void}
  */
 function checkNativeTextTracksSupport(options: KPOptionsObject): void {
-  if (isSafari() || isIos()) {
+  if ((isMacOS() && isSafari()) || isIos()) {
     const useNativeTextTrack = Utils.Object.getPropertyPath(options, 'playback.useNativeTextTrack');
     if (typeof useNativeTextTrack !== 'boolean') {
       Utils.Object.mergeDeep(options, {
@@ -433,6 +433,15 @@ function isSafari(): boolean {
   return Utils.Object.hasPropertyPath(Env, 'browser.name') && Env.browser.name.includes('Safari');
 }
 
+/**
+ * Returns true if user agent indicate that os is mac
+ * @private
+ * @returns {boolean} - if browser is Safari
+ */
+function isMacOS(): boolean {
+  return Env.os.name.toLowerCase() === 'Mac OS';
+}
+
 /**
  * Returns true if user agent indicate that browser is Chrome on iOS
  * @private
@@ -448,7 +457,7 @@ function isIos(): boolean {
  * @returns {boolean} - if browser is in LG TV
  */
 function isLGTV(): boolean {
-  return /^(?=.*\bweb0s\b)(?=.*\bsmarttv\b).*$/i.test(Env.ua);
+  return Env.os.name.toLowerCase() === 'web0s';
 }
 
 /**