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6/23/18 just downloaded new firefox on my Mac OS X 10.11,6 - won't launch - what do i do?

mimimcd

all questions like this are at least 6 months old. Looking for an answer specific to most recent firefox. Is firefox quantum good for personal use other than business?

all questions like this are at least 6 months old. Looking for an answer specific to most recent firefox. Is firefox quantum good for personal use other than business?

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Please explain the problem in detail. What happens? Error messages?