You can also go to the official Adobe website and resize the PDF. In such case, you can resize the PDF file, i.e., compress the size of the PDF file into a lesser app size. So, you will have trouble opening the file. If the file size of the PDF is too large, it will take a lot of time to download it.

Select Adobe Acrobat Reader DC and click on Always Open With.

Select the PDF file and right-click on it.

Select Adobe Acrobat DC and click on Always use this app to open PDF files box.

Locate your PDF file and right-click on it.

So, you must set Adobe Reader as the default program. For instance, Microsoft Edge is the default browser to open PDF files in Windows 10 and 11. Set Adobe Acrobat DC as a Default ProgramĪlthough you’ve installed Adobe Reader on your PC, it might open on a different app or browser. Then, you can open the file with Adobe Reader. In such a case, you need to unlock a PDF file to open it. So, if you don’t have access to the password for the file, you won’t be able to open it. Usually, some users protect their PDF file if it is confidential. Besides, here are 11 fixes you can try to open your PDF. So, before implementing other fixes, you can try unlocking the PDF and opening it. Similarly, your PDF won’t open if it is protected.

So, you can install Adobe Acrobat Reader or any other reader to fix the issue. You cannot open a PDF file if there is no PDF reader program on your device. File Incompatible with the PDF reader program.* Portable Document Format ('application/pdf')The most general reason why your PDF file won’t open is if it has downloading errors. * Portable Document Format (application/force-download) * Portable Document Format (application/x-download) * Portable Document Format (application/x-octet-stream) * Portable Document Format (application/x-pdf) * Portable Document Format (binary/octet-stream) * Portable Document Format (doesn/matter) So far, I can't figure out how to do that. I would like to know how to make Firefox go back to the old behavior of asking me whether I wanted to save the document, or open it with Adobe Reader. I found a page that directed me to set pdfjs.disabled to true, which I have done, and now Firefox only offers me the option of saving PDF documents - it no longer offers me the option of displaying them with Adobe Reader. With the release of 19.0, Firefox started displaying PDF documents within Firefox itself, which I don't want. Portable Document Format ('application/pdf')Īnd I just noticed now that Portable Document Format (application/pdf) is set to 'Adobe Reader'.

Portable Document Format (application/force-download).Portable Document Format (application/x-download).Portable Document Format (application/x-octet-stream).Portable Document Format (application/x-pdf).Portable Document Format (binary/octet-stream).Portable Document Format (doesn/matter).I have set the following Content Types to 'Always ask':

How to open pdf in adobe reader on mac