I have a big crossbar mark over my FF4 icon after I've installed and replaced FF3. When I try to open the software, I get "You can't open the application "Firefox" because it is not supported on this architecture." What's up with that?

I have a big crossbar mark over my FF4 icon after I've installed and replaced FF3. When I try to open the software, I get "You can't open the application "Firefox" because it is not supported on this architecture." What's up with that?

Firefox 4 requires at least OS X 10.5 and an Intel Mac. There is a third party version of Firefox 4 that runs on OS X 10.4/10.5 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox
If you prefer, you can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html

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