Preview mode Dreamweaver CS3/CS4 not compatible with Firefox 3.6.8
I found a post about this issue, which was marked 'solved', but it isn't! To use Firebug, I had to upgrade Firefox and since I did, I can't use the 'preview' function in Dreamweaver (It works only once, when Firefox is closed, but I don't like to close and re-open Firefox every time I want to preview a page). Downgrading is not an option, as I can't use Firebug and I really not think Adobe has to solve a problem caused by Firebox, as suggested in the previous post.
Every time Firefox opened
There is a fix available for Dreamweaver, so it works in Firefox 3.6+ versions: 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.