16.0.2 is the latest version(for 10.5.8),see in the above link Option 3: Continue to use Mac OS X 10.5 and Firefox 16
for 10.7.5 you can use the latest, BUT first fix your user agent because is corrupted by Fast Browser Search (FBSMTWB) and that identifies you as Firefox/3.5.2
see your user agent:
User Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 GTB5 FBSMTWB
Hello ourhouse2u, the update is for 10.7.5 as you said OR as system details said 10.5 ?
For 10.5.8 intel mac, [https://support.mozilla.org/en-US/kb/firefox-no-longer-works-mac-os-x-10-5#os=mac&browser=fx19 Firefox no longer works with Mac OS X 10.5]
16.0.2 is the latest version(for 10.5.8),see in the above link '''Option 3: Continue to use Mac OS X 10.5 and Firefox 16'''
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for 10.7.5 you can use the latest, BUT first fix your user agent because is corrupted by Fast Browser Search ('''FBSMTWB''') and that identifies you as Firefox/3.5.2
see your user agent:
User Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 GTB5 '''FBSMTWB'''
you must reset user agent, see how to do that : [https://support.mozilla.org/en-US/kb/websites-say-firefox-outdated-or-incompatible?redirectlocale=en-US&redirectslug=Websites+or+add-ons+incorrectly+report+incompatible+browser#w_firefox-is-showing-the-wrong-user-agent Firefox is showing the wrong User Agent]
see also : http://help.fastbrowsersearch.com/
for latest firefox version : [http://www.mozilla.org/en-US/firefox/all/ Download Firefox in your language]
thank you
