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Updated Firefox doesn't like to use Adobe Acrobat reader to read pdf files. Why

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Since I have upgraded to a newer version of Firefox, I can no longer read or print most pdf files found on the internet with Adobe Acrobat reader. This is very frustrating. It has been happening for the past 3 weeks.

Since I have upgraded to a newer version of Firefox, I can no longer read or print most pdf files found on the internet with Adobe Acrobat reader. This is very frustrating. It has been happening for the past 3 weeks.

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