Annoying FireFox popup

[jbarley]

Since the last FF updates "48.0.1, 48.0.2" Using FF's default start page I keep getting this annoying Google Play popup every time I start FF or open a new tab.
So far any attempts to ditch it have failed, I'm curious, am I alone with this problem or have others seen it and hopefully have found a solution?
Another odd thing is that while I can change my startup page to say "Google.com" and that works, opening a new tab insists on the FF default page complete with popup.
And yes I've set the normal settings to get New Tab to open with Home Page.

 

[Pakaku]

You went into General and removed all of that, right? Also never hurts to check your addons and extensions in case something unwanted slipped in.

 

[jbarley]

You went into General and removed all of that, right? Also never hurts to check your addons and extensions in case something unwanted slipped in.

Extensions , thanks for the tip.
A FF extension (classic old style) had a Tab setting to open new tabs with FF default homepage, so I managed now to get tabs to open however I chose.
Still no explanation for the FF homepage having that Goggle play popup.