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Fetching time in the browser isn't accurate because a lot of trackers exploit timing in order to fingerprint users. A lot of browsers now purposefully reduce the precision of the clock. See:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...

https://johnresig.com/blog/accuracy-of-javascript-time/

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Oh, how convenient. Sometimes I wonder if we shouldn't find a way to be able to run trusted applications instead of making everyone's life difficult all the time, and that's speaking as a security consultant, not even a developer... but yeah I don't see a good way to make that happen.

This reminds me a bit of ActiveX.

The whole Meltdown/Spectre thing also contributed greatly to reducing timer precision.

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