For vanilla foxPEP, yes. Some of it is irrelevant to TenFourFox and Firefox 45, as it was not intended for those platforms.
I was referring to the earlier iteration made for TFF - with all the graphic acceleration tweaks you made claims for - they are what Cameron confirmed were illusory.
If they are now gone then the prefs file is basically what the rest of us have been using for years - and that's how it appears in use.
Obviously for those who have never tampered with the TFF prefs file like @micahgartman it's a nice boost.