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Will Firefox 4 work with Mac Power Book G4?

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Hardware Overview:

 Model Name:	PowerBook G4 15"
 Model Identifier:	PowerBook5,2
 Processor Name:	PowerPC G4  (1.1)
 Processor Speed:	1 GHz
 Number Of CPUs:	1
 L2 Cache (per CPU):	512 KB
 Memory:	1.25 GB
Hardware Overview: Model Name: PowerBook G4 15" Model Identifier: PowerBook5,2 Processor Name: PowerPC G4 (1.1) Processor Speed: 1 GHz Number Of CPUs: 1 L2 Cache (per CPU): 512 KB Memory: 1.25 GB

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No it won't.

http://www.mozilla.com/en-US/firefox/4.0/system-requirements/

Mac Operating Systems

  • Mac OS X 10.5
  • Mac OS X 10.6

Recommended Hardware

  • Macintosh computer with an Intel x86 processor
  • 512 MB of RAM
  • 200 MB hard drive space

For older Macs that aren't supported in Firefox 4 / 5 / 6 /7, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 .
http://www.floodgap.com/software/tenfourfox/

http://tenfourfox.blogspot.com/