Adguard - Ad Blocker

AdGuard Browser Extension 4.4.39, Release date: October 21, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-4439
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AdGuard Browser Extension 5.0.159, Release date: October 22, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50159
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AdGuard Browser Extension 5.0.161, Release date: October 25, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50161
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AdGuard Browser Extension 4.4.41, Release date: October 25, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-4441

 

AdGuard Browser Extension 5.0.162, Release date: October 30, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50162

 

AdGuard Ad Blocker no longer supports Windows 7
November 1, 2024
https://adguard.com/en/blog/adguard-ad-blocker-cease-windows-7-support.html

 

Why they release/maintain four versions simultaneously?
TIA

 

4.4... is MV2, 5.0.... is MV3.

 

AdGuard Browser Extension 5.0.164, Release date: November 7, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50164

 

AdGuard Browser Extension 5.0.170, Release date: November 21, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50170

 

AdGuard Browser Extension 5.0.171, Release date: November 25, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-50171

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AdGuard Browser Extension 4.4.48, Release date: November 25, 2024
https://adguard.com/en/versions/browser-extension/release.html#version-4448