## Short description

## Steps to reproduce

 1. 
 2. 
 3. 

## Expected result


## Actual result


## Environment

 * Platform: [your platform here: Windows, OS X, or Linux with its version]
 * Version of Firefox: [version here]
 * Version of Tree Style Tab: [version or revision here]
 * Reproducible on clean environment?: [yes/no]
   * Possible conflicting addons: [list of addons required to reproduce the problem, e.g. Tab Mix Plus, Classic Theme Restorer, etc.]