Just installed Version 1.0.52 Update. Got a pop up suggested adding userChrome.css for styling tabs to indicate when suspended. However, the article for Modifying the Default Skin warns “Support for the userChrome.css file and any of its elements described below are not guaranteed in future versions of Firefox. Using it may lead to hard-to-diagnose bugs or crashes. Use at your own risk!” There is no such warning in the All Tabs Helper pop up or documentation (that I could find), so I gave it 3 star.