Plugin in Firefox renders XML as HTML

[yavin87]

With the OdooDebug plugin enabled, opening XMLs in Firefox (Win11, 149.0.2 (64-bit)) results in a rendered view, instead of showing the actual file content/source:

Actual (plugin enabled):

Expected (plugin disabled):

Test URL:
https://www.w3schools.com/xml/note.xml

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Currently I simply enable/disable the plugin, whenever I switch to/from working with Odoo, however it would of course be nice not having to go through the extra step.

[johnw-bluemark]

This bug report explains that an injected script tag can cause this problem, which is exactly what is happening here. The solution would be to only inject a script if the document is actually HTML.