Browser crashes/exits when tagging on Facebook

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Heya there, I am an online store owner in facebook. Lately, I have been experiencing difficulty tagging people on the pictures. I use firefox and it simply crash when I'm about to tag someone. Is because they have upgraded their site for more functionalities? It's frustrating! Even in IE, it keeps on recovering the opened tabs. I can't afford to save second by second to save my work. Please help!