How to remove browser warning message in HTML 5... | Adobe Community
Suggestions on how to remove the browser warning message in Firefox for Captivate HTML5
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Make Captivate HTML5 Work in Firefox
When Captivate publishes HTML5, it doesn't work in Firefox. Captivate exports only MP3 audio, and Firefox only plays OGGs. This post provides some tweaks for the Javascript to get rid of the error message and look for OGG versions of the file when needed. You have to create both versions of the audio files.