fix(suboptimal): ignore mobile browsers in whitelists/blacklists

react/features/base/environment/environment.js

         return false;
     }
 
-    const isBlacklistedBrowser = _isCurrentBrowserInList(
+    // Blacklists apply to desktop browsers only right now.
+    if (!_isMobileBrowser() && _isCurrentBrowserInList(
         interfaceConfig.UNSUPPORTED_BROWSERS || DEFAULT_UNSUPPORTED_BROWSERS
-    );
-
-    if (isBlacklistedBrowser) {
+    )) {
         return false;
     }
 
     // - the WelcomePage is mobile ready;
     // - if the URL points to a conference then deep-linking will take
     //   care of it.
-    return Platform.OS === 'android'
-        || Platform.OS === 'ios'
-        || JitsiMeetJS.isWebRtcSupported();
+    return _isMobileBrowser() || JitsiMeetJS.isWebRtcSupported();
 }
 
 /**
         return checkFunction ? checkFunction.call(browser) : false;
     }));
 }
+
+/**
+ * Returns whether or not the current environment is a mobile device.
+ *
+ * @private
+ * @returns {boolean}
+ */
+function _isMobileBrowser() {
+    return Platform.OS === 'android' || Platform.OS === 'ios';
+}