Don't you face Unresponsive Scripts issue on Firefox?

[Sloth]

Well. Technically, it's not the "public". Your IP is exposed all the time anyway. Consider a bridge network connection -- you're very vulnerable. That's why you need a firewall.

Usage statistics (also called "Telemetry" in non-release builds)

Usage statistics or "Telemetry" is a feature in Firefox that sends Mozilla usage, performance, and responsiveness statistics about user interface features, memory and hardware configuration. Your IP address is also collected as a part of a standard web log. Usage statistics are transmitted using SSL and help us improve future versions of Firefox. Once sent to Mozilla, usage statistics are aggregated and made available to a broad range of developers, including both Mozilla employees and public contributors. When Telemetry is enabled, certain short-term experiments may collect information about visited sites.

This feature is turned on by default in Nightly, Developer Edition, Aurora and Beta builds of Firefox to help those users provide feedback to Mozilla. In the general release version of Firefox, this feature is turned off by default.

https://www.mozilla.org/en-US/privacy/firefox/

 

[vivid]

@Sloth, https://support.mozilla.org/en-US/questions/1074502

in regards to telemetry: your IP address or individual telemetry data is NOT shared publicly - what is shared are the aggregated statistics covering all the submitted by all users with telemetry switched on. based on that you can discover things like X% of all firefox users also have set firefox as their default browser. this is accessible at https://telemetry.mozilla.org/

 

[Sloth]

@vivid Thank you very much. I'm "turning on" data sharing in Firefox.