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Firefox has a built-in PDF viewer. We'll show you how to disable it and use another PDF viewer, like Adobe Reader, instead.

Third-party PDF viewers are available, if you prefer not to use the Firefox built-in viewer. To switch from the built-in PDF viewer to another viewer: # [[T:optionspreferences]] # {for not fx56}Select the {menu Applications} panel.{/for}{for fx56}In the {menu General} panel, go down to the '''Applications''' section.{/for} # Find '''Portable Document Format (PDF)''' in the list and click on it to select it. # Click on the drop-down arrow in the '''Action''' column for the above entry and select the PDF viewer you wish to use. #;{for not fx57}{for mac}[[Image:ApplicationsPDF]]{/for}{for win,linux}{for not fx53}[[Image:Fx47Applications-PDFwin7]]{/for}{for =fx53,=fx54,=fx55}[[Image:Fx55Applications-PDF]]{/for}{/for}{for fx56}{for win}[[Image:Fx56GeneralApplications-PDF]]{/for}{for linux}[[Image:Fx56GeneralApplications-PDF_Linux]]{/for}{/for}{/for}{for fx57}{for mac}[[Image:applications 57]]{/for}{for linux}[[Image:applications-fx57-pdf]]{/for}{for win}[[Image:Fx57Applications-pdf-win7]]{/for}{/for} #;{for not fx53}{note}'''Note:''' If you want to view PDF files in Firefox using a plugin, instead of in an external PDF reader application, select '''Use ''PDF plugin name'' (in Firefox)'''. For more information, see [[View PDF files in Firefox]].{/note}{/for} # [[T:closeOptionsPreferences]]