Adobe Pepper Flash Player is a cross-platform, browser-based application runtime that provides uncompromised viewing of expressive applications, content, and videos across browsers and operating systems. Pepper Flash plugin is built for Chromium-based browsers, i.e. Chrome, Opera, Chromium etc.

Adobe bundles the Acrobat Chrome extension with Adobe Acrobat Reader DC so that you can easily open PDFs in Reader while browsing the web. Once installed and enabled, the extension will:

Open PDF files in the Acrobat Reader desktop app.
Offer a consistent and reliable PDF viewing experience.
Provide access to all the tools you need to add comments, fill forms, and sign PDFs.

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Currently, that means Reader 8.2.6 or 9.4.2. If you have eg 9.4.1, you can update to 9.4.2 via Adobe Reader - Check for updates. In Windows: Right click on your 'Chrome' icon. Choose properties. At the end of your target line, place these parameters: -allow-outdated-plugins. It should look like: chrome.exe -allow-outdated-plugins.

Note:

You can easily disable the extension at any time. The extension does not read the content of your PDFs or any content on the sites you visit.

The extension is not installed automatically with Acrobat Reader. If Acrobat Reader is the default PDF owner on your computer, you're prompted to install the extension when you launch Acrobat Reader. Once the extension is installed, you must activate it before use.

Steps to install and enable Acrobat Reader Chrome extension:

If Acrobat Reader is the default PDF owner on your computer, you're prompted to install the extension when you launch Acrobat Reader.

Install the Chrome extension prompt in case of Acrobat Reader update

Install the Chrome extension prompt in case of fresh Acrobat Reader installation

Click Continue or Next. The extension is installed and added to Chrome.

Open Google Chrome. You’ll see a prompt as shown in the screenshot below. Click the Enable extension button.

Using “Open in Acrobat Reader” option for PDFs opened in Chrome browser

When you open a PDF in Chrome, you see the Adobe Acrobat prompt in the upper-right corner of the window. Click Open in Acrobat Reader.

Right-click the extension, and then choose Manage extensions.

Right-click the extension, and then choose Remove from Chrome.

If you do not want users to see the in-app experience for Chrome extension, use the feature lockdown key to suppress it.

Registry val: “ENABLE_CHROMEEXT” to be added under HKLMSOFTWAREAdobeAcrobat ReaderDCInstaller

Data type	boolean: DWORD value > REG_SZ
Default	Null
Version #	DC
HKLM Path	HKLMSOFTWAREAdobeAcrobat ReaderDCInstaller
Summary	Specifies whether to lock the First Time in-app experience for Chrome Extension or Not
Details	Possible values include: 0 or 1: Suppresses the First Time in-app experience. By default, if the key is not present, users will see the in-app experience.

Many factors can affect the display of a document in PDF format on the web. This problem can appear as:

A blank (or gray) page in the web browser
PDF files open and then immediately close
PDF files download instead of display in the browser
'Adobe Reader blocked for this website' message (especially in Safari 7+)
A broken object link (for example, a red square, a blue triangle, or a blue circle)
A red X icon
Error: 'The Adobe Acrobat/Reader that is running cannot be used to view PDF files in a web browser. Adobe Acrobat/Reader version 8, 9 or 10 is required. Please exit and try again.'
Firefox error: 'Cannot use Adobe Reader to view PDFs in your web browser' (especially on a Mac)
Internet Explorer error: such as 'Internet Explorer has stopped working...', or 'Microsoft Visual C++ Runtime Error...'

Some of the causes for PDF display problems in an Internet browser include:

Browser plug-ins are blocked (unless set as 'trusted')
Corrupted PDF or related temporary files
Corrupted browser upgrade or add-on program
Restrictive security (or 'sandboxing'), pop-up blocker, or cookie settings
The web browser isn't configured to display PDF files properly
The web browser isn't configured correctly with the Adobe PDF Browser plug-in
Out-dated, incomplete or conflicting versions of Adobe Reader (or other PDF Reader)
Incompatible web browser settings
The web server on which the PDF file is stored can't deliver the PDF file
Incorrect Windows Registry settings.

Progressively click on the following topics as appropriate for instructions on possible solutions.

Index of Possible Solutions to PDF Display Problems

Delete Temporary Internet Files:
Verify or Set Adobe Enhanced Security to use Windows Trusted Sites
Enable the Adobe PDF browser Plug-in:
- Safari on Mac
Verify or Reset the 'Display PDF in Browser' Preference
Related Articles and Adobe Source documents (links outside this website)
- Advanced Solutions - Edit/Repair Adobe in Windows Registry

To see video instructions for the most common fixes, go to https://www.youtube.com/watch?v=_ufMfbRYB_8 .

Click here for instructions to Fix PDF Print from Browser problems

Close Acrobat Reader and open Windows File Explorer
Browser to C:Program Files (x86)AdobeAcrobat Reader DCReader (or older version 11 at C:Program Files (x86)AdobeReader 11.0Reader)
Double-click to run the “Eula.exe” file and accept Adobe’s license agreement.

Disable Protected Mode at Startup (using Sandbox restrictions)

Open Adobe Acrobat Reader DC
Click “Edit” and sel

Chrome Osx Adobe Reader Plugin