Do you mean the new page added to your home page? I cannot stop that the first time, but I have my home page setting in a user.js file in my Firefox profile. It will set the home page back again after the first shutdown after the install of the new version.

When the browser is launched, the window loads a Mozilla page on top of the home page I have designated in preferences. The old version does not do this, but the new one does. If I launch the new one and quit it, then launch the old one, it also will auto load an update page. I have set preferences->advanced->updates to NOT automatically check for updates to anything. I just don't want the old version scrapped or overwritten.

Make sure that you run each Firefox version with its own profile to prevent profile problems.

• http://kb.mozillazine.org/Profile_Manager#Creating_a_new_profile
• http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox

You can try to set the browser.startup.homepage_override.mstone pref to ignore on the about:config page.

• http://kb.mozillazine.org/browser.startup.homepage_override.mstone