Fullscreen mode not working with Firefox 68.0.2

[cecukemon]

In Firefox 68.0.2, clicking on the "Fullscreen" button in the example http://spritespin.ginie.eu/samples/#/api-fullscreen gives me the following error in the console: "TypeError: The expression cannot be converted to return the specified type." . The fullscreen example works fine in Chrome 76.

I had the same error in my application, the error message seems to originate in spritespin.js on line 1487.

[giniedp]

This seems to be only a problem of the spritespin page but not spritespin itself.

The page shows the examples using an iframe. To make it work in firefox, the iframe must have the allowfullscreen attribute to enable the full screen feature for its content