Following add-ons are for development of Selenese scripts. For the easiest download get all add-ons of SeLite Third Party collection.
and, or are case-insensitive in Firepath, but case-sensitive in Selenium IDE. Sometimes changing
If you develop Core extensions or SeLite frameworks (as per GeneralFramework) see also DevelopmentTools.
In order to use an old version of Selenium IDE
If you’d like to use the current development version of Selenium IDE, see InstallFromSource > Install Selenium IDE from source.