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Manifest V3 is an update to the manifest structure used by browser-extensions across the majority of the  browser market; it is presented as an upgrade to security, privacy and performance.<ref>{{Cite web |last=Li |first=David |title=Resuming the transition to Manifest V3 |url=https://developer.chrome.com/blog/resuming-the-transition-to-mv3 |url-status=live |access-date=24 Mar 2025 |website=Chrome for developers}}</ref><ref>{{Cite web |date=12 Sep 2024 |title=Overview and timelines for migrating to Manifest V3 |url=https://learn.microsoft.com/en-us/microsoft-edge/extensions-chromium/developer-guide/manifest-v3 |url-status=live |access-date=24 Mar 2025 |website=[[Microsoft]]}}</ref> Manifest V3's changes restrict the access browser-extensions can have, presenting a security benefit by not allowing them to load remote resources on the fly or deeply alter rendered content. By doing so, the effectiveness of the browser market's most effective ad-blockers is diminished.<ref>{{Cite web |last=Siddiqui |first=Aamir |date=17 Nov 2023 |title=Google's Manifest V3 changes will soon disable uBlock Origin on Chrome |url=https://www.androidauthority.com/google-chrome-manifest-v3-changes-3386506/ |url-status=live |access-date=24 Mar 2025 |website=Android Authority}}</ref> Workarounds and updated versions of Manifest V3 have been made but are less effective since, for example, blocked domains cannot be updated as conveniently.<ref>{{Cite web |last=Buria |first=Taras |date=3 Aug 2024 |title=uBlock Origin developer recommends switching to uBlock Lite as Chrome flags the extension |url=https://www.neowin.net/news/ublock-origin-developer-recommends-switching-to-ublock-lite-as-chrome-flags-the-extension/ |url-status=live |access-date=24 Mar 2025 |website=Neowin}}</ref> This manifest change is backed by leading Chromium browsers, making it difficult for other browsers to match previous ad-blocking abilities without committing to sustaining Manifest V2 (such as Firefox, which also uses chromium-sourced manifests<ref>{{Cite web |last=Sullivan |first=Edward |date=13 Mar 2024 |title=Manifest V3 & Manifest V2 (March 2024 update) |url=https://blog.mozilla.org/addons/2024/03/13/manifest-v3-manifest-v2-march-2024-update/ |url-status=live |access-date=24 Mar 2025 |website=[[Mozilla]]}}</ref>) or sustaining their own ad-blocking solutions<ref>{{Cite web |date=27 Jun 2024 |title=What Manifest V3 means for Brave Shields and the use of extensions in the Brave browser |url=https://brave.com/blog/brave-shields-manifest-v3/ |url-status=live |access-date=24 Mar 2025 |website=[[Brave]]}}</ref> of varied effectiveness.<ref>{{Cite web |date=17 Jun 2024 |title=Manifest v3 update: Vivaldi is future-proofed with its built-in functionality |url=https://vivaldi.com/blog/manifest-v3-update-vivaldi-is-future-proofed-with-its-built-in-functionality/ |url-status=live |access-date=24 Mar 2025 |website=[[Vivaldi]]}}</ref><!-- Citations support controversies of Google, Google Chrome, and other third-party companies/products. I suggest this be a part of those articles, and not Chromium.  -->
Manifest V3 is an update to the manifest structure used by browser-extensions across the majority of the  browser market; it is presented as an upgrade to security, privacy and performance.<ref>{{Cite web |last=Li |first=David |title=Resuming the transition to Manifest V3 |url=https://developer.chrome.com/blog/resuming-the-transition-to-mv3 |url-status=live |access-date=24 Mar 2025 |website=Chrome for developers}}</ref><ref>{{Cite web |date=12 Sep 2024 |title=Overview and timelines for migrating to Manifest V3 |url=https://learn.microsoft.com/en-us/microsoft-edge/extensions-chromium/developer-guide/manifest-v3 |url-status=live |access-date=24 Mar 2025 |website=[[Microsoft]]}}</ref> Manifest V3's changes restrict the access browser-extensions can have, presenting a security benefit by not allowing them to load remote resources on the fly or deeply alter rendered content. By doing so, the effectiveness of the browser market's most effective ad-blockers is diminished.<ref>{{Cite web |last=Siddiqui |first=Aamir |date=17 Nov 2023 |title=Google's Manifest V3 changes will soon disable uBlock Origin on Chrome |url=https://www.androidauthority.com/google-chrome-manifest-v3-changes-3386506/ |url-status=live |access-date=24 Mar 2025 |website=Android Authority}}</ref> Workarounds and updated versions of Manifest V3 have been made but are less effective since, for example, blocked domains cannot be updated as conveniently.<ref>{{Cite web |last=Buria |first=Taras |date=3 Aug 2024 |title=uBlock Origin developer recommends switching to uBlock Lite as Chrome flags the extension |url=https://www.neowin.net/news/ublock-origin-developer-recommends-switching-to-ublock-lite-as-chrome-flags-the-extension/ |url-status=live |access-date=24 Mar 2025 |website=Neowin}}</ref> This manifest change is backed by leading Chromium browsers, making it difficult for other browsers to match previous ad-blocking abilities without committing to sustaining Manifest V2 (such as Firefox, which also uses chromium-sourced manifests<ref>{{Cite web |last=Sullivan |first=Edward |date=13 Mar 2024 |title=Manifest V3 & Manifest V2 (March 2024 update) |url=https://blog.mozilla.org/addons/2024/03/13/manifest-v3-manifest-v2-march-2024-update/ |url-status=live |access-date=24 Mar 2025 |website=[[Mozilla]]}}</ref>) or sustaining their own ad-blocking solutions<ref>{{Cite web |date=27 Jun 2024 |title=What Manifest V3 means for Brave Shields and the use of extensions in the Brave browser |url=https://brave.com/blog/brave-shields-manifest-v3/ |url-status=live |access-date=24 Mar 2025 |website=[[Brave]]}}</ref> of varied effectiveness.<ref>{{Cite web |date=17 Jun 2024 |title=Manifest v3 update: Vivaldi is future-proofed with its built-in functionality |url=https://vivaldi.com/blog/manifest-v3-update-vivaldi-is-future-proofed-with-its-built-in-functionality/ |url-status=live |access-date=24 Mar 2025 |website=[[Vivaldi]]}}</ref><!-- Citations support controversies of Google, Google Chrome, and other third-party companies/products. I suggest this be a part of those articles, and not Chromium.  -->
==Licensing==
==Licensing==
Chromium's code is published under the 3-clause BSD license <ref>{{Cite web |last=Google |title=LICENSE |url=https://chromium.googlesource.com/chromium/src/+/master/LICENSE |access-date=2025-08-12}}</ref>
Chromium's code is published under the 3-clause BSD license.<ref>{{Cite web |last=Google |title=LICENSE |url=https://chromium.googlesource.com/chromium/src/+/master/LICENSE |access-date=2025-08-12}}</ref>


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Revision as of 23:11, 17 August 2025

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Chromium is a free and open-source web browser developed by and primarily maintained by Google.[1] Several major web browsers use Chromium as the base of their software, including Google Chrome,[1] Microsoft Edge,[2] Opera/Opera GX,[3] Brave,[4] and others.

Controversies

Manifest V3

Manifest V3 is an update to the manifest structure used by browser-extensions across the majority of the browser market; it is presented as an upgrade to security, privacy and performance.[5][6] Manifest V3's changes restrict the access browser-extensions can have, presenting a security benefit by not allowing them to load remote resources on the fly or deeply alter rendered content. By doing so, the effectiveness of the browser market's most effective ad-blockers is diminished.[7] Workarounds and updated versions of Manifest V3 have been made but are less effective since, for example, blocked domains cannot be updated as conveniently.[8] This manifest change is backed by leading Chromium browsers, making it difficult for other browsers to match previous ad-blocking abilities without committing to sustaining Manifest V2 (such as Firefox, which also uses chromium-sourced manifests[9]) or sustaining their own ad-blocking solutions[10] of varied effectiveness.[11]

Licensing

Chromium's code is published under the 3-clause BSD license.[12]

References

  1. 1.0 1.1 Google. "Chromium". Retrieved 2025-08-12. {{cite web}}: |last= has generic name (help)
  2. "10 cool things to check out at Microsoft Build 2019". blogs.microsoft.com. 2019-05-06. Retrieved 2025-08-14.{{cite web}}: CS1 maint: url-status (link)
  3. "Today, Opera 15 has been updated to Opera 16". blogs.opera.com. 2013-08-27. Retrieved 2025-08-14.{{cite web}}: CS1 maint: url-status (link)
  4. "Brave - Homepage". brave.com. 2025-08-14. Retrieved 2025-08-14.{{cite web}}: CS1 maint: url-status (link)
  5. Li, David. "Resuming the transition to Manifest V3". Chrome for developers. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  6. "Overview and timelines for migrating to Manifest V3". Microsoft. 12 Sep 2024. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  7. Siddiqui, Aamir (17 Nov 2023). "Google's Manifest V3 changes will soon disable uBlock Origin on Chrome". Android Authority. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  8. Buria, Taras (3 Aug 2024). "uBlock Origin developer recommends switching to uBlock Lite as Chrome flags the extension". Neowin. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  9. Sullivan, Edward (13 Mar 2024). "Manifest V3 & Manifest V2 (March 2024 update)". Mozilla. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  10. "What Manifest V3 means for Brave Shields and the use of extensions in the Brave browser". Brave. 27 Jun 2024. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  11. "Manifest v3 update: Vivaldi is future-proofed with its built-in functionality". Vivaldi. 17 Jun 2024. Retrieved 24 Mar 2025.{{cite web}}: CS1 maint: url-status (link)
  12. Google. "LICENSE". Retrieved 2025-08-12. {{cite web}}: |last= has generic name (help)