| Firefox 20 | Firefox | Firefox 64bit x64 | Firefox 28 | |
| 20.0.1 | 136.0.1 | 127.0.2 | 28.0 | |
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| Freeware | Open Source | Open Source | Freeware | Licence |
| FREE | FREE | FREE | FREE | Price |
| 20.10 MB | 0.36 MB | 54.70 MB | 24.00 MB | File size |
| Apr 11, 2013 | Mar 17, 2025 | Jun 25, 2024 | Mar 18, 2014 | Update |
| 60 | 140 | 71 | 77 | Downloads |
| Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64 | Windows 11, Windows 10 32/64 bit | Windows 7 x64, Windows 8 x64, Windows 10 x64, Windows 11 | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64 | OS |
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