Question: I have a document library with a PDF file. Whenever I click on the PDF file, I am prompted to save the file. I do not get the option of opening the file, I am forced to save it. What I want is for the PDF file to open, either in the browser or in a separate Adobe Reader window, depending on the Adobe Reader settings. I'm pretty sure SharePoint is responsible for this behavior, because if I put the PDF on my hard drive, then create a HTML file with a link to the file, it opens in the browser when I click on it.

Please note: I looked at [this question](https://stackoverflow.com/questions/1174842/sharepoint-open-document-library-pdf-in-new-window) and did not help. I don't care if the PDF opens in the browser or in a separate Adobe Reader window, I just want it to open.

Answer: 
for me it is easily fixed right after following powershell script

```
$webapp = Get-SPWebApplication https://portal 
$webapp.AllowedInlineDownloadedMimeTypes.Add("application/pdf")
$webapp.Update()

```

source: 
<https://sharepoint.stackexchange.com/questions/10900/how-can-i-force-sharepoint-2010-to-open-pdfs-in-the-browser>
Our company has the same issue. We solved by implementing PdfSharepoint forms. It may sounds like advertising but the product solved our needs saving Pdf forms in SharePoint 2010. You can check them [here](http://www.pdfsharepoint.com). It may be not for everyone but definitely worth trying if you have Adobe forms and SharePoint 2010. The fact that you can submit forms using Adobe Reader was a game changer for us.