| avast! Online Security | µBlock for Firefox | µBlock for Chrome | µBlock for Opera | |
| 20.2.500 | 1.58.0 | 1.58.0 | 1.58.0 | |
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| Freeware | Open Source | Open Source | Open Source | Licence |
| FREE | FREE | FREE | FREE | Price |
| 0.56 MB | 3.70 MB | 3.70 MB | 3.20 MB | File size |
| Jun 3, 2020 | May 21, 2024 | May 22, 2024 | May 21, 2024 | Update |
| 44 | 28 | 26 | 20 | Downloads |
| Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64 | Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64, Windows 11 | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64, Windows 11 | Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64, Windows 11 | OS |
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