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You can look at the network tab of your browsers dev tools. You can see everything being exfiltrated that way. In fact, that's pretty similar to the technique

You can look at the network tab of your browsers dev tools. You can see everything being exfiltrated that way. In fact, that's pretty similar to the technique that you'd use to check on a local app too, except it's built into the browser. I'm not particularly interested in convincing anyone that some app is or isn't leaking their data. If you don't want to use web stuff, don't use it. But I do take issue with assertions that 100% of all web apps must be doing that kind of stuff. It's obviously not true. You can develop your own web app from scratch that doesn't do it, which is sufficient to form a counter-example.

CRConrad 5y ago
Sure I can. And you can. But to 99% of users, you're talking Greek -- ancient, not modern. And hey, BTW: Can we always? Where's the "Dev tools" menu on my phone browser? And one counter-example does not a summer make. As long as 99% (typical Internet statistic, i.e. pulled from my mether regions) of web apps harvest your data for sale, that last percent won't get the benefit of the doubt: it's far too difficult and uncertain to find out which percent that would be.