Some minor compatibility issues.. Rated 5 out of 5 stars

Not compatible with Tab Mix Plus's Session saving feature. If Tab Mix Plus's Session saver is enabled, all the tabs will load; a quick restart of FF will bypass this.

This review is for a previous version of the add-on (1.5.1-signed). 

Issue #11 on Bitbucket

You could follow up on Bitbucket:

My original answer:
Would you mind to create a new issue at Bitbucket ( about this,including your Application's Build ID, and your enabled addons (with versions).Providing those informations could help fix your problems.Use about:support to gain these informations, or Nightly Tester Tools.Thank you!