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Gmail problem with Firefox 9.0.1, Windows 7 Home Premium SP1

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Gmail tell me: "Some important features may not work in this version of your browser, so you have been redirected to the Basic HTML version. Upgrade to a modern browser, such as Google Chrome. Try standard version anyway." Please, can you help me? Francisco

Gmail tell me: "Some important features may not work in this version of your browser, so you have been redirected to the Basic HTML version. Upgrade to a modern browser, such as Google Chrome. Try standard version anyway." Please, can you help me? Francisco

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And more! Mozilla site it is not recognizing my browser: FIREFOX 9.0.1! https://addons.mozilla.org/en-US/firefox/addon/deng-google-bookmarks/contribute/roadblock/?src=dp-btn-primary&version=1.2 See the image:

Modified by Francisco6x