On any device with Android 4.4.2 Opera 29 beta 1 request localization and that can be granted or denied at startup, is not the case with v28. Besides, another two things I've got on my mind: Appboy automation and WebRTC. Appboy is Opera's affair but something is not clear with WebRTC channel - it is true that since the code was moved on Git is enabled by default on Opera/Chrome (and FF if that counts) browsers? WebRTC interactive detection expose my local IP via GPRS and WiFi and native 8.8.8.8 DNS routing looks weird via Netherlands.
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