Google Cuts Off uBlock Origin on Chrome as Firefox Stands Firm on Ad Blockers
Google’s latest crackdown on browser extension has rendered popular ad blockers like uBlock Origin inoperable on Chrome, as the company pushes forward with its switch to Manifest V3. The move, which critics say weakens privacy protections, affects all Chromium-based browsers, including Microsoft Edge.
Firefox's Stance on Ad Blockers
Meanwhile, Firefox is doubling down on its commitment to ad-blocking tools, promising to support both Manifest V2 and V3, ensuring users retain control over their browsing experience. Manifest V3 is the newest version of Chrome’s extension framework but it has faced criticism for cutting off access to some of ad blockers’ functionality. It serves as the foundation for WebExtensions, which power browser APIs.
Google's Defense of Manifest V3
Google has defended Manifest V3, calling it “the first step in our platform vision to improve the privacy, security, and performance of extensions.” uBlock Origin, a popular and highly customizable open source ad blocker, previously functioned on Manifest V2 through a feature called blockingWebRequest. Chrome has replaced blockingWebRequest with declarativeNetRequest, which restricts how extensions interact with web content.
Impacts of Google's Changes
Google first announced its plan to end support for extensions using Manifest V2 specifications in late 2023. A series of updates in early March further disabled extensions like uBlock Origin.
Mozilla's Response
Meanwhile, Mozilla says its Firefox browser will support both Manifest V2 and Manifest V3. Mozilla Firefox held just 3.7% of the browser market in September 2024, but its dedicated user base prioritizes privacy and operability. Firefox has robust built-in ad blocking as well as supporting extensions like uBlock Origin. Firefox is standing firm in its commitment to privacy tools by allowing both blockingWebRequest and declarativeNetRequest.
Conclusion
More tools for developers means more choice and innovation for users. Giving people choice and control on the internet has always been core to Mozilla. It’s all about making sure users have the freedom to shape their own experiences online.
