Problem 3 did not show up with a different user/profile. I uninstalled and reinstalled Firefox, completely clean and then copied all the files from my previous profile into the new profile. It works now. I'm afraid I won't be of much assistance in troubleshooting - I don't want to install FireGPG for awhile.
I was using the latest update of Firefox 1.5. The extensions I am using are: Adblock, Firbug, Flashblock, Paste and Go, Prefbar, ReloadEvery, Aothink SWF CAtcher, Talkback and Torbutton.
Windows XP SP2 updated about a month ago.
Problem 3 was not a CSS problem. The browser would not act on some formatting code, such as:
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /><style><!--div.Section1 {page:Section1;}span.GramE {}span.SpellE {}.style1 {font-family: Arial, Helvetica, sans-serif}--></style><meta name="Microsoft Theme" content="canvas 011, default"></head><body background="../../_themes/canvas/cnvbkgnd.jpg" bgcolor="#FFFFFF" text="#000000" link="#0066CC" vlink="#006666" alink="#996699"><!--mstheme--><font face="Arial, Arial, Helvetica"></font>
In particular the canvas background on pages did not show. On other pages the color of the font was wrong. This could be an impossible to reproduce problem, possibly unrelated to FireGPG. Since others haven't reported it I would ignore this for now.
Sorry I did not install Console2 until after I re-installed Firefox.
Thanks.