Observed Signal · Jun 3, 2024 · Policy Update · Source: OnlineMarketing.de · Impact: 5/5 · Sentiment: Negative
Chrome Extensions Move to Manifest V3 Starting June
Starting June 3, 2024, Google began deactivating Chrome extensions based on Manifest V2 in Beta, Dev, and Canary channels as it migrates to Manifest V3. The migration shifts background context to Service Workers to save resources and blocks remote-hosted code for security. Google reports that about 85% of active extensions have already migrated to Manifest V3, with a broader switch to follow in early 2025 alongside changes to third-party cookies. The move prompts concerns from ad-blocking developers over limitations in the Declarative NetRequest API, including a 30,000-rule cap versus the tens or hundreds of thousands of rules needed by typical blockers. Google has paused Manifest V2 support and provided migration guidance. The article notes potential impacts on adtech and user privacy, while highlighting Google's stance on security and control over extensions.
Major platform policy update affecting Chrome extensions and ad-blocking capabilities; potential industry-wide impact
Track Google Signals & Market Shifts in Real-Time
Polaris7 autonomous intelligence agents track regulatory filings, primary sources, executive changes, and deal flow 24/7. Create your free Explorer workspace to monitor these entities.
Key Takeaways & Evidence Grounding
- Starting June 3, 2024, Google deactivates Manifest V2–based Chrome extensions in Beta, Dev, and Canary builds.
- Migration to Manifest V3 moves background logic from long‑running background pages to Service Workers and disallows remote‑hosted extension code.
- As of June 2024, about 85% of active extensions have migrated to Manifest V3.
- Manifest V3 imposes a 30,000‑rule limit for blocker rules, far below the ~300,000 rules needed by many ad blockers.
- Stable Chrome is expected to fully support Manifest V3 by early 2025, alongside changes to third‑party cookie support.
Connected Companies & Entities
2 Entities mappedOntology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Google to fully retire Manifest v2, breaking many adblockers
Google will fully disable Manifest v2 support in Chrome with versions 150 and 151 (end of June and July 2026), removing the last workaround that allowed older adblockers such as uBlock Origin to function. The company says Manifest v3 improves user privacy and security, but the API changes reduce filter capabilities relied on by many blocking extensions. Users who want to keep using older-style adblockers can switch to adapted MV3 versions like uBlock Origin Lite (with reduced functionality) or move to non‑Chromium browsers that promise longer MV2 support; Mozilla Firefox is expected to support MV2 longer, while Chromium-based browsers such as Edge and Opera may also drop MV2 in future.
Optimizing Network Interception in Chrome Manifest V3
This technical article (published 2026-07-08) describes architectural approaches for building a Chrome extension under Manifest V3 constraints. The author explains how Manifest V3 replaces persistent background pages with event-driven service workers and how synchronous webRequest blocking has been superseded by the declarativeNetRequest API. Using the SaveYourself extension as a concrete example, the piece shows patterns for treating service workers as stateless, persisting important state in chrome.storage.local, updating dynamic blocking rules via declarativeNetRequest, and using browser alarms and events instead of continuous polling. The article argues these patterns improve resource efficiency, maintain responsiveness, and align with Chrome’s modern security and privacy model.
US Government Excludes Microsoft from Visa Program
The US government has barred Microsoft from participating in the permanent residency process for foreign workers with H-1B visas, accusing the company of abusing the program. Vice President JD Vance stated that Microsoft laid off 6,000 American employees last year while benefiting from 6,300 H-1B visa holders. The Department of Labor, led by Keith Sonderling, will not accept new permanent residency applications from Microsoft, as well as several consulting firms and Adobe. This action comes weeks before the midterm elections and reflects the Trump administration's broader criticism of the H-1B program, which it claims disadvantages American workers. Microsoft has not yet responded. The move could impact the tech industry's ability to retain skilled foreign talent.
Track Real-Time Market Signals & Shifts
Set up custom watchlists to receive automated, evidence-grounded executive digests whenever material signals or shifts occur across your tracked landscape.