How to turn off Firefox upgrade tab

[Lars Eighner]

Since I upgraded, Firefox seems to call home and load it's homepage
in a tab on top every time it fires up, not matter what I do.  Preferences
still say to open firefox with my home page.  I tried blanking every
url in about:config that has the mozilla url, but that won't stop the
behavior.

Also, is there a way to disable both new tabs and new windows (i.e. force
reuse the same window always)?

-- 
Lars Eighner
http://www.larseighner.com/index.html
8800 N IH35 APT 1191 AUSTIN TX 78753-5266