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How can I download Firefox 4? I can only find no 5. I really need 4 so I can use the Google toolbar. My work depends on it.

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I had Firefox 4 on my MAC laptop. I then updated it with Firefox 5 to only find out that Firefox 5 does not support the Google Toolbar. I now need to download Firefox 4 but I can't find it anywhere. How can I download it again?

I had Firefox 4 on my MAC laptop. I then updated it with Firefox 5 to only find out that Firefox 5 does not support the Google Toolbar. I now need to download Firefox 4 but I can't find it anywhere. How can I download it again?

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This is a replication of another post

https://support.mozilla.com/en-US/questions/852325

and should be locked.