We’ve just completed the development of the One Race Wear microsite for our friends Bionic Systems and their client One Industries.

Bionic Systems were responsible for the project and art direction, we added our Flash treatment:

In the last few days I’ve been experiencing weird rendering problems in some websites while using the latest stable version of Firefox (3.0.1) in MAC.

Searching google I found more people having similar issuses like blinking pages when using SWFAddress for Flash in FF3 MAC.

• SWFAddress Help Forum
• Firefox 3 + Adblock = disaster (asfusion blog)
• FF3 breaks SWFAddress (sometimes) on OS X
• Firefox 3 and SWFAddress

In all the cases the solution given for the problem is to add a small delay between the visual transition and the JavaScript interaction of SWFAddress.

After reading all this posts I thought the problem was specific for SWFAddress but my surpsise was when I found similar problems in one of our projects which is not using SWFAddress at all and it is almost 4 years old (AS2). In this specific project we were using ExternalInterface extensivelly.

I have done a small test with just a gradient background and three round corner buttons using ExternalInterface call method to call three different javscript functions and the results are scary:

1) First button (left) calls an alert in javascript using a timeout:

JAVASCRIPT: setTimeout(”alert(’test 1 with timeout’)”, 1000);
FLASH: ExternalInterface.call(”test1″);

2) Second button (middle) calls an alert in javascript:

JAVASCRIPT: alert(”test2 no timeout”);
FLASH: ExternalInterface.call(”test2″);

3) Third button (right) calls scrollTo in javascript:

JAVASCRIPT: scrollTo(0,100);
FLASH: ExternalInterface.call(”test3″);

Second and third button in FF3 MAC makes the flash movie to behave in a weird way when the javascript action is executed.

http://www.lessrain.com/projects/luis/as3/bugs/ff3mac/deploy/

Looking at this results and considering that SWFAddress uses ExternalInterface I can say for now that part of the problem is caused by using the ExternalInterface call method in FF3 MAC (looking at the problem from a flash developer point of view, I don’t know what is happening behind the “Cocoa Firefox” scenes), but maybe the problem goes deeper than this, I don’t know yet, this is only my first attempt to find out the causes of Flash blinking and behaving bad in FF3 MAC.