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Does FF 26 work reliably with Win8.1 because FF25 did not?

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I do not wan t to repeat my Win 8.1 update if FF26 isn't running smoothly yet. I did the whole upgrade with FF 25 and had to revert back to Win 8.0 and I lost many files. Be honest please. Currently running HP Pavilion w/AMD Processor, 8GRAM.

I do not wan t to repeat my Win 8.1 update if FF26 isn't running smoothly yet. I did the whole upgrade with FF 25 and had to revert back to Win 8.0 and I lost many files. Be honest please. Currently running HP Pavilion w/AMD Processor, 8GRAM.

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In what way did Firefox 25 not work properly?