Mozilla Firefox 450 1 Old Version · Must Watch

Despite the danger, there are three legitimate (albeit niche) reasons to hunt for an old Firefox build like 4.5.0.1:

| Metric | Firefox 450.1 | Chrome 475 | Safari 32 | |--------|--------------|------------|-----------| | Cold start (M.2 SSD) | 0.6 sec | 1.2 sec | 2.1 sec | | Tab restore (500 tabs) | 4.8 sec (lazy load) | 22 sec (crash) | N/A | | Memory after 24h uptime | 1.1 GB | 3.9 GB | 2.4 GB | | Canvas FPS (WebGPU chaos) | 144 fps | 88 fps | 102 fps | | Ad/tracker scripts blocked | 99.4% | 76% | 91% | mozilla firefox 450 1 old version

Firefox 4.5.0.1 has over 250 known, unpatched critical security vulnerabilities. These include: Despite the danger, there are three legitimate (albeit