Enable Chrome Site Isolation for Stronger Site‑to‑Site Security
Learn how to turn on Chrome’s Site Isolation feature to run each website in its own renderer process, improving security and limiting cross‑site attacks.
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chromeFirefox Site Isolation (Project Fission): Architecture, Trade-offs, and Operational Reality
Firefox's Project Fission (Firefox 93+) isolates cross-origin documents into separate OS processes to mitigate Spectre-class attacks. Covers per-eTLD+1 design, IPC bridges, trust boundaries, verification via about:processes, failure modes, and future design pressures.
firefoxFission Site Isolation: Default Enforcement Timeline for Low-Memory Devices Unresolved
Rollout Status and Hardware Constraints Firefox's Fission architecture has been gradually enabled by default since version 86, controlled via the fission.autostart preference. Mozilla's telemetry-driven expansion continues without a published version target for universal enforcement. Memory Overhead vs. Security Baseline Typical memory increases of 10–20% ar