I'm running Mac OS X, and Spaz opens links in Safari even though I chose another browser (like Firefox) as my default. How do I fix this?

Adobe AIR opens links with the default browser chosen for the .html/.htm file associations, not your default browser. If you would like to use another browser, please do the following:

Right click on a .html/.htm file and click "Get Info". Go down to the "Open With" section and select the browser you want. Then click "Change All"