Firefox 3.6 adds scrollbars to a fullscreen Flex or Flash application
After updating to Firefox 3.6, my Flex applications received unwanted scrollbars after clicking (activating) them.
Firefox 3.6 will draw a 1 pixel ‘focus’ border around the Flash player.
To avoid this issue, just add the following css to your index.template.html.
a:focus, object:focus { outline: none; -moz-outline-style: none; }
For more information : http://www.flashcomguru.com/index.cfm/2010/3/22/prevent-swf-border-firefox
Wannes, just a quick tip. To prevent these kinds of issues, always embed your SWF using SWFObject, size it using SWFFit, enable mousewheel support for Mac by using the MacMouseWheel javascript and make it accessible using SWFAddress.
The SWFFit for instance would have prevented the behaviour you describe above.
Thanks for the tip Sven,
for the Mac mousewheel issue I rather like the use the next solution. Really easy to implement!