Firefox and Chromium
17 days ago
- #firefox
- #chromium
- #browser-security
- Firefox is often recommended for security, but this article highlights its weaknesses compared to Chromium.
- Firefox's sandboxing is less granular and weaker, especially on platforms like Linux and Android.
- Chromium's site isolation feature provides better protection against cross-site attacks and Spectre vulnerabilities.
- Firefox lacks modern exploit mitigations like Arbitrary Code Guard (ACG) and Code Integrity Guard (CIG) in most processes.
- Chromium employs more advanced Control Flow Integrity (CFI) and shadow stacks to prevent code reuse attacks.
- Firefox's JIT compiler lacks several hardening techniques present in Chromium's V8 engine.
- Firefox uses mozjemalloc, which is less secure than Chromium's PartitionAlloc, making it more prone to heap exploitation.
- Firefox has limited use of memory-safe languages like Rust, and mixed-language binaries can introduce security bypasses.
- Security experts criticize Firefox's security model, citing its immature sandboxing and lack of key mitigations.