I faced the same problem a year ago. It was part of an issue that I 
posted on this list (on the 21st of February, to be precise). Martin 
Honnen, in a reply to my post, surmised that Firefox executes the 
stylesheet only when it is in the same folder or a subordinate folder as 
the XML file, not when it is in a superordinate folder. I found this 
assumption to be correct. So, as far as I was able to figure out back 
then, there are two solutions to the problem:

1) Move the XSL stylesheet to the same or a subordinate folder as the 
XML file.
2) Install a web server on the computer and serve the XML file via the 
web server.

I chose option 2 because, in my case, it was the easier solution.

Cheers,
Wolfhart


On 29-03-22 18:06, Michele R Combs mrrothen@xxxxxxx wrote:
>
> This is XSL-coding-adjacent so Im hoping someone knows.
>
> Firefox is declining to apply an xsl stylesheet to an XML document.  
> This is a pair of documents Ive used many times over the years for 
> demoing how the browser can be used to apply XSL to render an XML file 
> into HTML.  Last year we had to tweak Firefoxs 
>  privacy.file.unique.origin setting in about:config but that 
> particular setting doesnt seem to be present in this latest version 
> of Firefox, at least I dont see it in about:config, nor anything 
> resembling it.  Both the XML and XSL are in the same local folder on 
> my desktop.  If anyone knows a fix Id be grateful.
>
>
> Thanks
>
> Michele
>
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