Flex Development with Firefox

Does it drive you crazy that every time you run your Flex app it opens in a new Firefox tab or window? Here's the fix:

In the address bar, enter about:config

Search for or add the following two entries and set their values to 1:

browser.link.open_newwindow = 1
browser.link.open_external = 1

Now the same window will be used every time. No browser restart required. This works with 3.6.8 but future versions might change these keys.