I've just jump from the FF 38 ESR stream to the 45 ESR one and have noticed that when I open a new tab, FF only shows its new tab screen, not my preset, custom URL.
I have the newtab field set in about:config but it ignores this settings now it seems.
I've read about the optional about:home and about:blank settings it can handle but about:home takes you to a different 'home' page than what the Home button does.
Just wondering if this is just me or some new undesirable effect FF now has.
thanks @nukecad, I was using another, similar, add-on yesterday when I first noticed this bug but have (for now) removed it and the like in the hope of finding a more in-built, do-as-the-browser-newtab-url-config-setting-bloody-says approach.