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I cannot install Firefox on my iBook G4 with OS X 10.5.8

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I did download Firefox to my iBook G4 but the system showed that Firefox cannot be installed to Application. It shows the stop sign on Firefox. I changed my hard drive and Operation System. So, I need to re-install Firefox again. I try to install but it shows stop sign every times.

I did download Firefox to my iBook G4 but the system showed that Firefox cannot be installed to Application. It shows the stop sign on Firefox. I changed my hard drive and Operation System. So, I need to re-install Firefox again. I try to install but it shows stop sign every times.

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PPC Macs aren't supported in Firefox 4+ versions.

For older Macs that aren't supported in Firefox 4.0 & 5.0, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 .
http://www.floodgap.com/software/tenfourfox/
http://code.google.com/p/tenfourfox/

Or use Firefox 3.6.x.
http://www.mozilla.com/en-US/firefox/all-older.html