I cannot view pdfs in Firefox 4 on a mac (10.6.7), is there a solution?

Recently upgraded to Firefox 4, sadly I can no longer view pdfs from within the browser, running on a mac OS 10.6.7
PDF browser does not work, neither does Acrobat
Any help appreciated
All the best
Derek Jamieson

I have the same problem. I love Firefox but I can't believe Mozilla released FF4 without a plug-in for viewing PDFs on Mac OS X. Between that and the fact that Lotus Notes web client doesn't like FF4, I had to downgrade to FF 3.6.16.

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