There a few real old Bugs in Firefox that can cause that problem with both Print Preview and with actual Printing. I use Print Preview before printing anything from Firefox, and when I see an incomplete Preview I open any other browser and print that page from that other browser. In all honesty though, I doubt if that affects any more than 5% of the web pages that I attempt to print through Firefox - it's not all pages.

I suppose the Mozilla developers don't think printing is important enough to fix those 8 to 10 year old Bugs, because I have been waiting for those Bugs to be fixed since the first version of Phoenix I installed and saw that problem - Phoenix 0.3 in late 2002.

Thanks but using two browsers to compensate for long-known bugs in Firefox hardly justifies all the effort. Is it code protection for Print Preview/Print or something that simply no one wants to fix? Too old to bother with?

"In all honesty though, I doubt if that affects any more than 5% of the web pages that I attempt to print through Firefox - it's not all pages."

If the bug affects the web pages that I use, it's enough to justify a bug report. The webpages are all in Monster.Com. The issue isn't about 5% or 1% levels but closure on functionality as basic as Print Preview and Print.

If I have to use two browsers to print, then it's an issue, not just a 5% (or less) thing.

You stated "As with earlier versions, Firefox 3.6.12 does not allow Print Previewing of any website content beyond first page". That isn't true from what I have seen when trying to print web pages myself. My experience has been as I stated, like maybe 5%. I'm not trying to push you to use Firefox when you are having these problems with printing. I'm just trying to let you know that these problems have been around for a long time, and I don't think a fix is coming any time soon.

No, it's not "code protection". I don't think any of the developers have the talents to fix what's wrong with printing in the core code. Plus, print related Bugs never seem to have any priority attached, along the lines of "this is important and as the developer in charge of this module, I say it should be fixed before release the next major version. Let's make this a high priority and get it fixed ASAP". Then before they know it, that Bug is forgotten about as of being any priority to fix and 8 years passes.

If you are interested in reading some of these print Bugs, see this search of Buzilla - 2479 Bugs related to "Print". Keep in mind that Bugzilla is for all Mozilla products, not only Firefox. So many of those Bugs are for products like SeaMonkey and Thunderbird, or the Gecko core that is part of all Mozilla products.
https://bugzilla.mozilla.org/buglist.cgi?quicksearch=Print

If you see any Bugs that affect you, register for Bugzilla and vote for those Bugs. Unless you can offer a "fix", please don't make any comments in those Bugs. I sometimes think that some Bugs don't get fixed in a timely manner due to all the "spam" in the Bug report, by way of angry comments, which wastes time which could be spent writing code to fix the Bug. It ain't a discussion forum for users to rant about the individual Bug.