To automate iMacros for Firefox 8.5.1 or later you need iMacros Enterprise Edition 9.02 or later.
Conversely, if you are using iMacros Enterprise Edition 9.02 or later, you need iMacros for Firefox 8.5.1 or later to automate Firefox.
Update 6/13/2012
To automate Firefox 13 or later you need:
1. Download iMacros for Firefox V7.5.0.1 or later: http://wiki.imacros.net/iMacros_for_Fir ... on_History
2. Download iMacros V8.02.1960 or later: http://wiki.imacros.net/Version_History
To automate Firefox 12 or lower you need:
1. iMacros for Firefox V7.5.0.1: http://wiki.imacros.net/iMacros_for_Fir ... on_History
2. iMacros V8.01: http://wiki.imacros.net/Version_History
Note: With the combination of iMacros 8.01 and iMacros-FF 7.5.0.1, the use of iimRunner is once again supported on Windows XP.
Update 10/10/2011
To automate Firefox 6 or later you need:
1. Download iMacros for Firefox V7.4.0.4 or later: http://wiki.imacros.net/iMacros_for_Fir ... on_History
2. Download iMacros V7.50 or later. Or, just download iimfirefoxconnector.dll and save it in your current iMacros program folder.
Note: The use of iimRunner with Firefox via iimInit ("-fx -fxProfile <name> -runner") is not supported on Windows XP.
Original Post 1/21/2011
Problem: The iMacros Scripting Interface DLL IOpusConnector.xpt is not included in the most current general release iMacros for Firefox installer (XPI) to circumvent a known bug in Firefox 3.6.x.
Solution: We have rewritten our Firefox driver to work around the Firefox bug and at the same time improved speed and reliability. Improved reliability means in this case that iMacros handles Firefox quirks better

The result is that iMacros can now fully automate all Firefox versions, including the latest Firefox 4 Beta.
To automate Firefox with the iMacros Scripting Edition, you need:
1. Download iMacros V7.22 or later: http://wiki.imacros.net/Version_History
2. Download iMacros for Firefox V7.3.0.0 or later: http://wiki.imacros.net/iMacros_for_Fir ... on_History
After you have installed the new version, you can use iimInit ("-fx") and iimInit ("-fx -fxProfile <name>") to drive Firefox just as before.
