Bug 300492 – Proton Mail PDF and DOCX previews do not display

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: WebKitGTK

[Caden Mitchell]

# Description

Proton Mail's web app lets you preview files such as PDF and DOCX before downloading. You can read these documents in the email client. This does not function on WebKitGTK-based browsers.

# Steps to reproduce

1. [Create a Proton Mail account](https://mail.proton.me)
2. Log in to Proton Mail account
3. Email a PDF and DOCX to your Proton email
4. Open the email with the attachments and click on the attachment to open a preview

# Expected result

Attachment preview should be visible

# Actual result

There is no ability to preview common filetypes like PDF and DOCX in this browser engine. It is just a blank screen with no document reader.

[Michael Catanzaro]

Probably a duplicate of bug #272590. Please check your web inspector!

[Michael Catanzaro]

Also please check if the docx document is being converted to PDF. Probably? If not, then this is different.

[Caden Mitchell]

(In reply to Michael Catanzaro from comment #2)
> Also please check if the docx document is being converted to PDF. Probably?
> If not, then this is different.

Okay, yes, even the DOCX gives that error to me:

`[Error] Refused to load blob:https://mail.proton.me/fd8dik39-729di-48wus-a29mxwb-293nx02mmpoz because it does not appear in the frame-ancestors directive of the Content Security Policy.`

I obfuscated the blob URL for security purposes, that is not the real url, just looks similar. I guess this is a duplicate.

[Michael Catanzaro]

OK, thanks for checking.

*** This bug has been marked as a duplicate of bug 272590 ***