firefox：56
Slenium IDE: 3 Series
Question: Selenium IDE no toolbar, you can not export the recorded script, which gives automated testing work has brought great inconvenience.
Solution: firefox downgrade (after only 54 support and do not support the Selenium IDE)
I will firefox 56 uninstall and re-install firefox 53 download. At the same time, removing the original train in firefox Selenium IDE 3, the corresponding, replaced selenium_ide-2.9.1-fx.xpi
After all installation is complete, Slenium IDE does not display the icon in the upper right corner firefox, after many "disabled" - "Enable" conversion, or not visible. Each time only to open the Tools menu:
Try the next "record" "playback", "Export", everything is normal.