for Flex development. I am very sorry to say that it sucks, when it comes to debugging.
Its stack trace for breakpoints is WRONG in 99% cases which makes
it very difficult to debug reliably.
Breakpoints can trigger Firefox's hang protection. You can disable hang protection by setting dom.ipc.plugins.timeoutSecs to -1.
See Disable Hang Protection for details.
in a firefox tab, type about:config
dom.ipc.plugins.timeoutSecs to -1.