1611423 - XML files don't pretty print and are displayed as plain text

Status: RESOLVED DUPLICATE of bug 1605657

(Core :: XML, defect)

Description

[Maciej Jaros]

Attachment: xml_chrome.png

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0

Steps to reproduce:

1. Visit some page serving XML.
2. Server provides "Content-Type: application/xml; charset=utf-8".
3. Response contains no DOCTYPE.
4. Also XMLNS is custom i.e. non-xhtml (and non-html).

Example URL:
http://data.bn.org.pl/oai/bibs?verb=ListIdentifiers&metadataPrefix=marc21&from=2019-11-01T00:00:00Z&until=2019-12-10T00:00:00Z

Actual results:

Blob of text (textContent?).

Expected results:

View of XML tree. Attaching expected view (from Chrome).

It seems to be broken just now.

• It works fine on Ubuntu on 72.0.1.
• It doesn't work on Windows 7 on 72.0.2.

Also see complain here:
https://superuser.com/questions/1308064/firefox-stopped-displaying-xml-files-how-to-fix

And please note that Doctype is NOT required for XML. It's actually kind of required for valid HTML, not for XML.

Comment 1

[Maciej Jaros]

Attachment: xml_blob_ff.png

View from Windows 7, FF 72.0.2.

Comment 2

[Gingerbread Man]

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0
20200117190643

Works for me. Please check what happens when you restart with add-ons disabled (Safe Mode). Add-ons are known to cause this (bug 1401793, bug 1605657).

Comment 3

[Maciej Jaros]

A workaround for me is to disable LastPass and refresh. But this wasn't a problem with previous Firefox and is not a problem with Chrome (for whitch I also use LastPass).

So seems like this is a duplicate of bug 1605657.