What version of RH are you using? A lot of issues were fixed in the patches for RH7.
See Browsers on my site.
I installed the patch at some point, so I am running RH version 7.02.001, but the auto-sizing popup is still not working in FireFox.
Test it in a new project. My understanding was that this had been fixed.
I'm also having an issue with auto-sizing popups in Firefox. I'm running RoboHelp HTML 7.03.001. In projects created in this version of RoboHelp the popups work correctly in Firefox, but in projects created in an earlier version and updated in this version, the popups are not correctly sized and always appear at the top of the window instead of next to the link they're connected to. This same problem occurs in topics that were created in an earlier version of RoboHelp then imported into a project created in version 7.03. Is there any way to fix the older popups?
Have you tried Tools | Update DHTML-effects in topics ?
You may also want to check out this post: http://forums.adobe.com/message/2262688, and this post: http://forums.adobe.com/message/2207677#2207677 I don't know if the problems there are exactly the same as yours, but it's definitely worth a try, especially Praful's 'updated' ehlpdhtm.js.
Thanks for your reply Willam.
I poked around a little more and discovered that the popup size issue I was having actually had to do with a combination of factors that didn't actually relate to Firefox so that's no longer a problem.
However, the placement of the popups in Firefox is still an issue. I tried the new ehlpdhtm.js file you pointed me to, and it does prevent the popups from appearing partway off the screen, but they still always appear at the very top of the screen. (The Tools | Update DHTML-effects function had no effect.) It's not the end of the world, since the popups do appear, but it's not ideal behaviour either.