# 1Blocker 4.0 Adds In-App Tracker Blocking with Its New Firewall Feature - MacStories

<https://www.macstories.net/reviews/1blocker-4-0-adds-in-app-tracker-blocking-with-its-new-firewall-feature/>

- Host: [macstories.net](https://links.thingelstad.xyz/hosts/macstories.net/)
- Saved: April 29, 2021 (2021-04-30T01:50:13Z)
- Record: https://links.thingelstad.xyz/links/a25890f63ea0/
- JSON: https://links.thingelstad.xyz/links/a25890f63ea0.json

## What Jamie wrote

I've been a user of [1Blocker](https://1blocker.com) for years now. 1Blocker is one of my primary tools to protect my privacy on the web. However, it has historically only been useful as a content blocker in Safari. Now this new version has introduced an **on device** firewall capability that is super interesting. You have always been able to use a 3rd party VPN service to protect privacy, but I don't use this as I find the performance and usability impact too severe. This firewall operates totally on device, so performance is solid and it enables a blocking function at the network stack layer. This is an exciting new capability and will significantly improve privacy protections. 🔒

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Appears in

- [WT184: Weekly Thing #184 / UML, Vizy, Markdown](https://weekly.thingelstad.com/archive/184/), Recommended Links

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## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://www.macstories.net/reviews/1blocker-4-0-adds-in-app-tracker-blocking-with-its-new-firewall-feature/