I have been having problems printing web pages with Firefox under CentOS 4.8:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14) Gecko/2009091009 CentOS/3.0.14-1.el4.centos Firefox/3.0.14
What happens is that some of the text is 'scrambled' (looks like somehow something is messed up with the font encoding of whatever font is being used). Sometimes the postscript (or PDF) code being generated is broken (the ghostscript print filter crashes because the postscript is broken or incomplete. For one page I get the console message "could not load glyph 321". When I print to a file and select 'PDF' format, I get sometimes PDF files that ghostview (gv-3.6.2-2.el4)/ghostscript (ghostscript-7.07-33.11.el4) find errors with. Xpdf (xpdf-3.00-20.el4) also does not like these PDF files (lots of errors of various sorts). Even Adobe's acroread does not like them sometimes. Sometimes, with enough fussing with I can get the PDF files to print. Sometimes I end up taking a screen shot with gimp of the Adobe acroread window and print that. :-(
I have done two things:
1) Created a fresh profile and re-populated with my bookmarks, passwords, and addons. No difference.
2) Created a fresh profile and did not re-populate with with anything (basically a 'vanila' profile). I still have problems.
It appears that there is some system setting or some package I have loaded (I have a bunch of packages from rpmforge and epel installed). I also have some extra fonts installed. I am not sure what the problem is. I have Seamonkey installed and Seamonkey *seems* to print at least some pages properly (not extensively tested).
I like firefox and have it all setup the way I like. Everything *except* printing works just fine. Firefox *used* to print just fine. I *think* the problem with printing started with Firefox 3.0.<mumble>, but I am not sure exactly.
Oh, I *don't* run either the Gnome or KDE desktop environment -- I use a plain window manager only (FVWM in MWM mode).