Firefox Focus does not and will never leak or send browsing behavior details.
The article is factually incorrect. I am not sure how the researcher came to the conclusion that Focus reports 'server connections' or 'visited websites'. It does not and it never will.
The fact that a Mozilla product sends my data, even if it is only my IP address, to a third party, is a disgrace. I don't really care what the data is.
I understand they need analytics and telemetry. They have the money, they have the power to build all of those in house. They should not be sending my data to a third party, whatever that data might be. That's all. I expected better from Mozilla. Pocket integration was a letdown, this is even worse.
You can disable data collection in the settings, or directly install Firefox Klar, a special version of Firefox Focus without telemetry made for Germany, Austria and Switzerland.
As others have said, the option to disable telemetry is in the other stores.
Read the article, it says it too:
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You can turn off the anonymous data collecting of Firefox Focus by tapping on the settings icon, and flipping the switch next to "send anonymous usage data" to off.
https://github.com/mozilla-mobile/focus-ios/wiki/Install-Tra...