I have even been using IE 9.0. May pet peeve with Firefox is the extraordinarily long time that it takes to launch the program - IE, and Chrome are much, much faster. There are some sites that are not rendering correctly in IE, but this is a Beta release and these will hopefully be fixed in the final.
I have another peeve with Firefox which I have had since the first iteration, and which has never been addressed. When I click on a URL link in my Outlook program and my default browser, which has been Firefox is not open, I get the following error message:
"Windows cannot find "<URL or path to file>". Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search."
Following this, the browser opens to he correct web page, but it is a (admittedly a minor) pain to have to close the message box each time. The way to prevent it the following (for Vista and Win 7 - for XP - go to the URL below):
Go to "Start -> Run" (or press the windows key+R) then type regedit and click OK
Use the directory tree hierarchy to navigate "HKEY_CLASSES_ROOT\HTTP\shell\open\ddeexec"
Delete the "ddeexec" registry key
Repeat for "HKEY_CLASSES_ROOT\HTTPS\shell\open\ddeexec" (and any other protocols you want to fix)
Repeat for "HKEY_CLASSES_ROOT\FirefoxURL\shell\open\ddeexec"
Repeat for "HKEY_CLASSES_ROOT\FirefoxHTML\shell\open\ddeexec"
Unfortunately, each time a new update is released, the problem returns and I have to repeat these steps. The problem and the solution are documented at:
So one would think that it would have been fixed by now. It does not occur when either Chrome or IE is set to be my default browser. This has been a problem with Windows XP, Vista and 7, and with Outlook 2003, 2007 and 2010.