Yesterday I was trying to test a fullscreen button on a video player and realised that I couldn't unless it was inside a browser window. Unfortunately this meant that I would have no way to view traced results, so I installed Vizzy, a browser app that allows you to view flash traces whilst viewing your flash in a browser. I've known about Vizzy for a while, but I've previously had no real need for it and when I've tried to install it in the past it didn't seem to work with Chrome (my current browser of choice) so it was uninstalled pretty quickly. But this time I had no choice but to get it working - and as it turns out, the solution was pretty simple...
Step 1 - Install Flash Debug Player
First off you need to make sure that you have the flash debugger installed. You can download it here and you can test if it's installed by clicking here. Don't worry if you're using Chrome and the test site is saying that you don't have the debugger installed, if you view the link in any of your other browsers you will see it has worked.
NOTE: if you use FlashDevelop like myself then you've probably already got the debug player installed, but it won't hurt to reinstall it anyway (and it will update you to the latest version).
Step 2 - Install Vizzy
You can download Vizzy here. To test, open a swf that you know contains traces in your browser and make sure Vizzy is open at the same time. Vizzy will act like your Flash IDE Output window. But again, don't worry if you're using Chrome and it's not working at this point.
Step 3 - Disable Chrome's pre-installed Flash player
Steps one and two should be enough for you to view flash tracing in most browsers - Firefox was working straight away for me. However if like me you want to use Chrome instead, you will need to disable Chrome's internal pre-installed Flash Player. Don't worry it's very easy...
a) Open a new Chrome window (CTRL-N if you're reading this in Chrome)
into the address bar.
c) You should see a list of plugins - Flash is most likely to be the one at the top. Click "Details" in the top right hand corner and you will notice that there are 2 versions of flash installed. One of these is the pre-installed Flash player and the other is the Flash Debug Player you installed earlier. Find the one that ends with gcswf32.dll (ie. Chrome's version of the player) and click "Disable".
That's it, you're done. Clicking here should now tell you that you have the Debug Player installed and Vizzy should now work for you.