Choose from thousands of extra features and styles to make Firefox your own.Close
|User since||August 19, 2012|
|Number of add-ons developed||1 add-on|
|Average rating of developer's add-ons||Rated 5 out of 5 stars|
Simple HTML(5) problems detector.
This add-on is not compatible with your version of Firefox because of the following:
No add-on reviews yet.