Windows XP; Rec'd std windows explore window urging updated 21 FF w/link + buttons. not the usual style view, so has not clicked. is it legitimate?

I run windows XP on PC. A window Explorer windows asking me to update Firefox 21 popped up. The window includes a link 'more info' and a 'remind me later' and 'install' button. Never seen this style of notification before anything so I clicked and rejected the window. Is this a legitimate firefox notification? Otherwise, what have I been invaded by, and how should I proceed?

Hello, it is difficult to judge what was going on by the description only - in case it happens again, please try to create a screenshot of the dialog in question and attach it to an answer in the forum here...

in any case, firefox 21 was released last week and you must indeed upgrade to the latest version. Just go to firefox > help > about firefox to find and apply the update.

Update to the latest version of Firefox

Tags: Firefox

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