… but it isn’t really. If you are having this problem, it might just be that the path to the style-sheet is either an absolute path or a relative path upwards.
It might be that Firefox 3 is blocking access outside the current directory. That is a security feature, and as such is worth having. If you can, move the XSLT style-sheet into or below the directory of the XML file using it.
Alternatively, you might opt to disable this security setting, and return to the Firefox 2 behaviour in this respect:
- type “about:config” into the address bar
- change the value of “security.fileuri.strict_origin_policy” to “false”
This information is from mozillaZine.