300492 2025-10-09 23:34:12 -0700 Proton Mail PDF and DOCX previews do not display 2025-10-10 16:04:14 -0700 1 1 1 Unclassified WebKit WebKitGTK Other PC Linux RESOLVED DUPLICATE 272590 P2 Normal --- 1 caden webkit-unassigned bugs-noreply mcatanzaro oldest_to_newest 2149903 0 caden 2025-10-09 23:34:12 -0700 # 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. 2149965 1 mcatanzaro 2025-10-10 07:11:28 -0700 Probably a duplicate of bug #272590. Please check your web inspector! 2149971 2 mcatanzaro 2025-10-10 07:31:42 -0700 Also please check if the docx document is being converted to PDF. Probably? If not, then this is different. 2150072 3 caden 2025-10-10 15:03:40 -0700 (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. 2150092 4 mcatanzaro 2025-10-10 16:04:14 -0700 OK, thanks for checking. *** This bug has been marked as a duplicate of bug 272590 ***