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cant open pdf file ..it says....the adobe/acrobat reader that is running can not be used to view PDF files in a web browser. please exit adobe/acrobat reader and exit your web brouser and try again

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cant open pdf file ..it says....The adobe/acrobat reader that is running can not be used to view PDF files in a web browser. please exit adobe/acrobat reader and exit your web browser and try again

cant open pdf file ..it says....The adobe/acrobat reader that is running can not be used to view PDF files in a web browser. please exit adobe/acrobat reader and exit your web browser and try again

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-> Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

-> Clear Cookies & Cache

-> Clear the Network Cache

Plugins Updates

Your Flash plugin is quite older. You need to update it.

Your Java plugin is quite older. You need to update it.

-> Update All your Firefox Plugins

When Downloading Plugins Update setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)

Check and tell if its working.