4) URL bar #2: They have changed the selection behavior in the URL bar to always select the entire url. There doesn't seem to be any way to quickly select a single portion of the URL for example to change from http://games.slashdot.org/ to http://hardware.slashdot.org/. I have found this to be the single most annoying feature of the new Firefox by far. In fact that alone is probably enough to keep me from upgrading on my other computers. This behavior can be changed with about:config. Change the value "browser.urlbar.clickSelectsAll" from true to false.
This article in Macworld has more information: http://www.macworld.com/article/133674/2008/05/ff3urls.html
Slashdot Mirror
This article in Macworld has more information:
http://www.macworld.com/article/133674/2008/05/ff3urls.html