ftp://ftp.mozilla.org/pub/firefox/releases/

3.5.19 was the last security update for the old EOL Firefrox 3.5.

If it is just for one thing then perhaps you can use Firefox 3.5.19 portable version either on hard drive or on flash drive. http://portableapps.com/apps/internet/firefox_portable/localization#legacy35

Ah scratch that as Ed probably would have linked to that if you were using Windows...

James,

The "owner" is using Mac OSX, so that link to Portable Apps won't do him any good. Portable versions for Mac are available here - http://sourceforge.net/projects/osxportableapps/files/Portable%20Firefox%20OS%20X - but the real fix is to patch that old version of Dreamweaver.

There is a fix for Dreamweaver, so it works in Firefox 3.6+ versions on MacOSX 10.5 and higher - may be inconsistent with lower versions of Mac OSX - and it doesn't say if it has been tested with Firefox 4 & 5 : http://solutions.marketingmedley.com/

There is a $5.00 fee for that Dreamweaver fix. That website and the fix are not associated with Mozilla in any manner. Support for that fix is provided by that that website via email.