diff --git a/TOOLS.md b/TOOLS.md
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+++ b/TOOLS.md
@@ -24,6 +24,7 @@
 * [Chromium](https://download-chromium.appspot.com/)
 * [Vivaldi](https://vivaldi.com/de/)
 * [Brave](https://brave.com/de/)
+* Firefox
 
 ## Browser Erweiterungen
 * [HTML Extension Chromium](https://chrome.google.com/webstore/search/html?hl=de&_category=extensions)