@roytam1 : Something to keep an eye on (and probably revert/omit to maintain XP compatibility) :
#1782 Remove support for obsolete system themes from Goanna
Issue #1782: Remove Luna, Royale and Zune support from the platform
It never ceases to amaze me though that, despite the fact official UXP has currently a plethora of open issues regarding its deficits in tackling the modern web , the dev team are obsessed with opening "new issues" targeting revengefully Windows XP...
I guess destroying is much more easier than creating,,,
This might have changed in some prior release, it just so happens I took notice of it in the latest one...
ALL references to the native platform name, Goanna, have been replaced with Gecko, Firefox's one, in ALL three variants of the browser User Agent string:
Additionally, previous about:config entries goanna.buildID & goanna.mstone (Goanna milestone) have been replaced with gecko.buildID & gecko.mstone, respectively...
Was the above intentional on your part? Is New Moon 27 being "Firefox-ified" ?
FTR, I use the Fx-compat setting, two "Gecko" fragments with two different values looks confusing...