diff --git a/packages/@ember/-internals/browser-environment/index.ts b/packages/@ember/-internals/browser-environment/index.ts
index f0866f134ec..c3a7a064350 100644
--- a/packages/@ember/-internals/browser-environment/index.ts
+++ b/packages/@ember/-internals/browser-environment/index.ts
@@ -11,7 +11,7 @@ export const location = hasDom ? self.location : null;
 export const history = hasDom ? self.history : null;
 export const userAgent = hasDom ? self.navigator.userAgent : 'Lynx (textmode)';
 export const isChrome = hasDom ? typeof chrome === 'object' && !(typeof opera === 'object') : false;
-export const isFirefox = hasDom ? /firefox|fxios/i.test(userAgent) : false;
+export const isFirefox = hasDom ? /Firefox|FxiOS/.test(userAgent) : false;
 export const isIE = hasDom
   ? typeof MSInputMethodContext !== 'undefined' && typeof documentMode !== 'undefined'
   : false;