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Tuesday, July 13, 2010

Flex / ActionScript: Debugging causes Firefox to crash

After an update to Firefox 3.6.6 I've noticed that while debugging Flash it would crash and display "The Adobe Flash plugin has crashed". It turns out it's due to a new feature called "Hang Protection" that allows Flash to run in it's own sandbox and not take down the whole browser when/if it crashes. After 45 seconds the browser will close Flash because it thinks Flash has stopped responding.

Hang Protection can be turned off so debugging with Flex Builder / Flash Builder will work properly. Follow the directions at this url.

Firefox 4 requires a change to a different property. Use about:config to alter the behind the scenes settings and look for dom.ipc.plugins.timeoutSecs and set it to -1.

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