How to Fix uBlock Origin on Chrome 142 (January 2026)

Google Chrome’s new update (Version 142) has created problems for many users. After this update, uBlock Origin and other ad blockers stop working or get blocked by Chrome.

If you are trying to fix uBlock Origin on Chrome 142, this guide will help you.
It explains all working methods for Windows and macOS users.

Let’s begin.

uBlock Origin Not Working on Chrome 142 — Why?

uBlock Origin is a free, open-source ad blocker used to block ads, trackers, pop-ups, crypto miners, and harmful URLs.
But Chrome 142 introduces new restrictions (related to Manifest V2), which break or disable uBlock Origin.

Luckily, you can still fix it with a few simple workarounds.

uBlock Origin Fixes for Chrome 142

The fastest fix is to launch Chrome using a special command-line flag.
This flag tells Chrome to ignore the new restrictions and allow Manifest V2 extensions.

Another option is to manually install the latest uBlock Origin build from GitHub.

All working methods are explained below.

Method A: Add Command-Line Flag (Windows)

This fix works when uBlock Origin is already installed but Chrome has blocked it.

Steps:

1. Right-click your Chrome shortcut.
2. Click Properties.
3. In the Target field, go to the end of the text.
4. Add one space and paste this code:

--disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disabled

5. Click Apply → OK.
6. If Windows asks for Admin permission, allow it.
7. Close Chrome completely and reopen it using this modified shortcut.

This usually restores uBlock Origin instantly.

Method B: Use Automator Launcher (Mac)

If you are on macOS, you can create a custom Chrome launcher that includes the required flag.

Steps:

1. Open Automator.
2. Choose File > New > Application.
3. Add Run Shell Script from the actions list.
4. Remove the default text and paste this:

/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disabled

5. Save the app as Chrome with uBlock (or any name you like).
6. Now open Chrome using this new app.

uBlock Origin will work again.

Method C: Manual uBlock Origin Installation (Windows/Mac/Linux)

Use this method if Chrome removed uBlock or blocked installation.

Steps:

1. Visit the uBlock Origin GitHub releases page.
2. Download the Chromium .zip version.
3. Extract the .zip file.
4. Open Chrome → type chrome://extensions.
5. Enable Developer mode (top-right switch).
6. Click Load unpacked.
7. Select the folder named:
   UBlock0.chromium (inside the extracted folder)

This installs the latest working build.

Post-Configuration Steps

After applying the above fixes:

✔ Keep Developer Mode ON

Go to chrome://extensions and keep Developer Mode enabled.
This prevents Chrome from disabling uBlock again.

✔ Reinstall if Needed

If uBlock still fails, download the newest version from GitHub and install it again using Load unpacked.

Alternatives if uBlock Stops Working Again

Chrome may soon block these methods permanently. So you may consider switching options:

1. Move to Firefox

Firefox still fully supports uBlock Origin without hacks.

2. Try uBlock Origin Lite

This is a Manifest V3-compatible version.
It works on Chrome 142+, but it is less powerful than the original extension.

Final Thoughts

Chrome 142 has made life difficult for ad blockers, but the fixes above still work as of November 2025.
Whether you prefer command-line flags or manual installation, you can get uBlock Origin running again within minutes.

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