Help - stumble and yahoo toolbars on firefox won't load!

[bigpurplep]

Hi, and thanks for the help!

I downloaded the newest version of firefox, and my stumbleupon toolbar disappeared. I downloaded it again, and restarted firefox because it said to restart for the toolbar to appear. And it does not appear! I have also downloaded the new version of yahoo toolbar and restarted, and now my yahoo toolbar is gone, too. I would really appeciate help to fix this problem. I miss my toolbars!

I have Windows Vista, and I am a beginner.... Thanks!