# 🔗 Browser telemetry - 2025 edition

- Author: @gurupanguji
- Date: 2025-04-18
- URL: https://gurupanguji.com/blog/2025/04/18/browser-telemetry-2025-edition/
- Categories: link, technology
- Tags: arc, browser, chrome, edge, floorp, kagi, microsoft, microsoft-edge, orion, safari, web-browser, zen, zen-browser

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> Charts
>
> *number of connections for 2025 and 2021, for each browser tested. some of the web browsers weren’t tested in 2021 but they are now.

*Source:* [Web Browser telemetry - 2025 edition - sizeof(cat)](https://sizeof.cat/post/web-browser-telemetry-2025-edition/)

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<p><a href="https://sizeof.cat/post/web-browser-telemetry-2025-edition">https://sizeof.cat/post/web-browser-telemetry-2025-edition</a></p>
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> All web browsers tested are the latest versions available today, test device is a MacBook M1 laptop (so macOS Sonoma, but the results should be similar regardless of the operating system) with a clean profile, all network connections blocked, application-level network connection whitelisting and only [Little Snitch](https://www.obdev.at/products/littlesnitch/) installed. So it’s actually Little Snitch that does all the heavy-lifting, I’m just the robot that is parsing the data.
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> All network traffic is routed through a VPN in Japan.

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<p>I am shocked by Zen, Floorp, Edge. Unsurprised by chrome, although looking at the urls it talks to, it's not super bad - it's phishing site data etc. Safari is low, but still more than I expected and Kagi's Orion and Tor Browser truly take the win with <strong>ZERO</strong>.</p>
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