diff --git a/README.md b/README.md
index 6c9ce17..e81fe00 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 ## What it does
 
+**Please install [Tree Style Tab](https://addons.mozilla.org/firefox/addon/tree-style-tab/) before installing this extension, because this extension depends on it!**
+
 This addon would like to color tabs based on the parent tab that opened the tab.  
 So say I am at work searching for a solution to a javascript problem on stackoverflow, so I open a bunch of tabs with possible solutions. Then I get distracted, and I start looking for honey badger images on google images, I open a bunch of tabs with honey badger images.  
 Now all my tabs are mixed up with javascript snippets and honey badgers.
@@ -12,4 +14,8 @@ At the moment this is not possible because of Firefox bug [1320585](https://bugz
 
 So this extension **tries** to get the favicon of the newly opened tab, and changes the color of the favicon to match that of the parent.
 
-**Please install [Tree Style Tab](https://addons.mozilla.org/firefox/addon/tree-style-tab/) before installing this extension, because this extension depends on it!**
+But it will not work
+- on pages that don't have a favicon
+- on pages that don't allow content scripts (amo for example)
+- on pages that dynamically change the favicon
+- a lot of other cases