Can you provide a rough estimate of the size of your project (disk space) and more importantly size of your TOC/Index/Glossary (number of entries in each.)
This would help us pin-point the issue.
It's a very large project. The project folder is about 129 MB with all of the images. It's hard to say how big the TOC/Index/Glossary are. Is there a place where the number of items is listed? They're all pretty big. The TOC is at least hundreds of topics, if not in the thousands. There's probably several hundred glossary terms. The Index is massive. I can't even estimate how big it is. Thousands of entries.
The WebHelp output view says that I have 1578 HTML topics.
With the help of one of our developers, we think we've narrowed the problem down to the Index. The browsers seem to crash when loading the Index information, but run fine when deleting the references to the Index data in the idx.js file.
We have no problems with our Index in the Webhelp format, so I think it's just a problem with how the Responsive HTML5 output handles the Index.
Thanks for the information. We are working on this issue.