How to stop animation from playing in web browser before play button is clicked

i've made simple edge animation , coded png image button make animation play. but, when open edge animation in browser animation imediately begans play though play button hasn't been clicked.  after animation auto plays upon load browser can click play button , animation play again. however, don't want animation play @ until image coded play button clicked.  glitch in edge ?

try going here:

http://forums.adobe.com/message/5124955#5124955

 

basically need disable autoplay.

 

 

or possibly add stop trigger begining of timeline. hope helps.

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