diff --git a/src/is/types.js b/src/is/types.js
index 8d117e2..8df3c47 100644
--- a/src/is/types.js
+++ b/src/is/types.js
@@ -125,6 +125,13 @@ export function isWindowObject(value) {
     return value != null && typeof value === 'object' && 'setInterval' in value;
 }
 
+/**
+ * Returns whether the current browser is Firefox
+ */
+export function isFirefox() {
+    return typeof InstallTrigger !== 'undefined';
+}
+
 export default {
     object: isObject,
     array: isArray,
@@ -142,4 +149,5 @@ export default {
     regexp: isRegexp,
     undefined: isUndefined,
     windowObject: isWindowObject,
+    firefox: isFirefox,
 };