Brijesh Desai 
Chrome Update Disables Ad Blockers: Chrome 150 and 151 will disable popular ad blockers like uBlock Origin and AdBlock Plus. Google migrating from Manifest V2 to Manifest V3, removing MV2 flags in 2026. Wind-down started 2024, full MV2 disabled mid-2025.
Google Chrome’s next updates will disable many popular ad blockers including uBlock Origin and AdBlock Plus as Google completes the migration from Manifest V2 to Manifest V3 for Chrome extensions.
Chrome 150 will remove the “ExtensionManifestV2Disabled” flag (the last workaround to keep MV2 blockers alive), and Chrome 151 will delete all remaining Manifest V2-related flags, closing the door for MV2-based ad blockers completely.
Timeline: When This Happens
The wind-down started in 2024, and by mid-2025 Chrome disabled Manifest V2 extensions for most users. Now Google is removing the final escape hatches.
Which Ad Blockers Will Be Disabled
uBlock Origin — one of the most trusted and popular ad blockers — quietly breaks on Chrome.
What’s Changing: Manifest V2 to Manifest V3
Manifest V2 (Old System)
- More powerful — ad blockers could access entire web page before loading
- Better filtering — could block ads more effectively
- Used by — uBlock Origin, AdBlock Plus, AdBlock
Manifest V3 (New System)
- Less powerful — limits what extensions can access
- Restricted filtering — can’t block all ads effectively
- Required by — All new Chrome extensions
Google is shutting down the older system that strong ad blockers depend on to do their job.
Why Google Is Doing This
Google claims Manifest V3 improves:
- Security — extensions have less access to sensitive data
- Performance — faster extension loading
- Privacy — better control over what extensions can see
However, critics argue it’s really about:
- Protecting ad revenue — Google earns billions from ads
- Reducing competition — makes it harder to block ads effectively
- Controlling extensions — more control over what extensions can do
What Happens to Your Ad Blocker
If You’re Using Manifest V2 Ad Blockers:
After Chrome 150:
- Limited DevTools workaround remains, but requires manual page element editing each time
- Not suitable for daily use — too cumbersome
After Chrome 151:
- No workaround — Manifest V2 ad blockers completely gone
- Only MV3-compatible blockers work
Alternatives to Check
Manifest V3-Compatible Ad Blockers:
- AdGuard (MV3 version)
- Pocket Ad Block (MV3)
- Certain versions of AdBlock (MV3)
However, MV3 blockers are significantly less effective than MV2 blockers due to API restrictions.
Browser Alternatives:
- Brave Browser — built-in ad blocking (no extensions needed)
- Firefox — still supports Manifest V2 extensions
- Safari — doesn’t use Manifest V3
How to Check Your Current Status
- Open Chrome → Click puzzle icon (extensions)
- Manage extensions → Find your ad blocker
- Check manifest version — Look for “Manifest V2” or “Manifest V3”
- If V2 — It will break in Chrome 150-151
What You Should Do
If You Want to Keep Blocking Ads:
If You Don’t Care About Ad Blocking:
- Just let Chrome update automatically
- Your ad blocker will disappear
The Bottom Line
Chrome 150 and 151 will completely disable popular Manifest V2 ad blockers like uBlock Origin and AdBlock Plus by removing the last flags that allowed MV2 extensions to work. The transition from Manifest V2 to Manifest V3 started in 2024, with full MV2 disabled for most users by mid-2025. Chrome 149 (current version) still has workarounds, but Chrome 150 removes the “ExtensionManifestV2Disabled” flag, and Chrome 151 removes all remaining MV2 flags. Strong ad blockers that depend on Manifest V2 will break completely, leaving users with less effective MV3 alternatives or browser switches to Firefox/Brave.
Quick Summary
Chrome 150-151 will disable Manifest V2 ad blockers including uBlock Origin, AdBlock Plus, AdBlock. Chrome 150 removes “ExtensionManifestV2Disabled” flag (last workaround), Chrome 151 removes all MV2 flags (“ExtensionManifestV2Unsupported”, “ExtensionManifestV2Availability”, “AllowLegacyMV2Extensions”). Wind-down started 2024, full MV2 disabled mid-2025 for most users. Chrome 149 (current) still works with workarounds, but Chrome 150-151 break MV2 blockers completely. Manifest V3 less powerful than V2, limits ad blocking effectiveness. Alternatives: Firefox (still supports V2), Brave (built-in blocking), MV3 ad blockers (less effective).