That is not possible. Mac OS X 10.4 doesn't support features that current Firefox versions require. ---- The last Firefox version that runs on Mac OS X 10.4 is Firefox 3.6.28. Current Firefox versions require a Mac with an Intel processor and OS X 10.6 (Firefox 16 runs on Intel Mac OS X 10.5). *http://www.mozilla.org/firefox/25.0/system-requirements/ For an unofficial Firefox 17.0.10 ESR compatible version that runs on a PowerPC Mac with OS X 10.4.11 or OS X 10.5.8 you can look at TenFourFox. *http://www.floodgap.com/software/tenfourfox/ *http://www.macupdate.com/app/mac/37761/tenfourfox *http://code.google.com/p/tenfourfox/wiki/ReleaseNotes1710 See also: *http://code.google.com/p/tenfourfox/wiki/PluginsNoLongerSupported *http://code.google.com/p/tenfourfox/wiki/QuickTimeEnabler *http://code.google.com/p/tenfourfox/wiki/AAATheFAQ

Firefox 3.6 was the last release of Firefox that supported 10.4. You can try the community supported [https://code.google.com/p/tenfourfox/downloads/list?can=3&q=&colspec=Filename+Summary+Uploaded+ReleaseDate+Size+DownloadCount tenfourfox] If you want to read more about tenfourfox you can visit the website. http://www.floodgap.com/software/tenfourfox/