Twitter Embedded Timeline and Firefox 29.0


Hi, i create a new Timeline for my Website and insert the script into it.
But only my IE11 shows the Timeline when i start the index.html on my Server :frowning:
No other Browser (Firefox or Safari) shows my timeline … but why?
I found no solution in the Net … please help.

Funny is the fact -> when i start the page on my PC (klick on index.html in the test Folder and open the file in Firefox), it works!!! No joke!!!