Take a trip to Holland and visit http://www.wvanweelden.eu/articles/robohelp-patches-and-updates
You will find a complete list of fixes for browser issues.
I don't think they cover the Firefox issue but post back when you have made those changes.
See www.grainge.org for RoboHelp and Authoring tips
Thanks a lot for your advice.
I've tried all the updates except the Patch 11.0.2 (No link yet, download via the menu Help > Updates). I'm unable to get this patch.
After applying the other three updates, I've verified that no changes are seen. As usual the help content is not visible in the right pane of the output in IE9.
Kindly let me know what else to be done.
In the output, is the content correctly formatted on browsers other than Firefox?
Where is the content located? Hosted on a web site? Do you know what kind of web server? (Apache on Unix/Windows, IIS, etc.)
If you open the developer console with F12, inspect the topics, do you see any errors in the error tab? If you select an item in the topic, what does Firefox show as CSS being applied?