If you are encountering difficulty opening PDFs from Drive in Chrome like the below...

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...you may need to download the Adobe Acrobat extension from the Chrome store

Click on Connect more apps


Then click on Adobe Acrobat


Select Install


Confirm the subsequent prompt


Then select the Gmail account you are downloading the app for


Confirm the subsequent prompts





Ensure you are happy with the access you are giving then click Allow


Next time you click Open with, Adobe Acrobat for Google Drive should be available


Note: you will be prompted to confirm your account the first time you use it