You can check the about:config page for extensions.screenshots.* prefs to check if this feature is currently disabled. *extensions.screenshots.system-disabled *extensions.screenshots.disabled When you enable this feature then you should see the toolbar button appear immediately. --- You can open the <b>about:config</b> page via the location/address bar. You can accept the warning and click "I'll be careful" to continue. *http://kb.mozillazine.org/about:config