diff --git a/linux/firefox.md b/linux/firefox.md
index d9f85d3..28dcede 100644
--- a/linux/firefox.md
+++ b/linux/firefox.md
@@ -4,6 +4,9 @@
 
 **WARNING**: You are creating a Firefox browser which can use **deprecated**, **unsafe** plugins like Flash or Java. Please keep in mind to only access safe webpages with it. **You have been warned!**
 
+Links:
+* [Superuser.com - How to circumvent to disablement of flash plugin](https://superuser.com/a/1617236/1446767)
+
 1. Download and install an older version of Firefox, e.g. version 51
 2. Install flash plugin
 3. Create a separate user profile for this installation