Websites which I previuosly used with Firefox 3 no longer work properly wiht Firefox 4. For several sites the web pages do not display properly and I cannot view PDF documents.
My banking websites and websites I use for my work that have linked PDF documents do not work. The financial website pages display improperly and I cannot see the PDF documents. All of these sites work properly in Internet explorer and in Firefox 3/
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In my case, QWest, now known as Century Link, switched everyone to it's new home page, doing away with Windows Live. It reminds me of what occured when I first "upgraded" to FF4; certain boxes on MyMSN wouldn't display. It took about 4 weeks before things corrected themselves without any help from the forum or me. Like MyWoods86, it does work on IE9. Come on, Mozilla. This crap is supposed to happen to them, not you.