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Why my firefox cannot open? How i fix this problem without losing all my bookmarks?

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I don't know what happended, today i wanted to open firefox and click on it, it does not open as usual and no matter how many time i clicked, it does not open.

how can i fix this without losing all my bookmarks?

I don't know what happended, today i wanted to open firefox and click on it, it does not open as usual and no matter how many time i clicked, it does not open. how can i fix this without losing all my bookmarks?

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Firefox doesn't give any error message, it just stalls or never shows up?

If you haven't already, could you check the tips in this article: Firefox won't start - find solutions.