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UBlock Origin Auto-Removal in Chrome: What's Going On?

Exploring the recent reports of UBlock Origin being automatically removed from Chrome, despite command-line arguments.

T

The AdBlock Mobile Team

December 29, 2025

A recent online discussion caught my eye regarding a frustrating issue some Chrome users are experiencing: UBlock Origin, a popular and highly effective ad blocker, is being automatically removed from the browser, even when users have attempted to bypass restrictions using command-line arguments. This got me thinking about the ongoing cat-and-mouse game between ad blockers and browser developers, and what it means for the future of ad blocking.

Let's delve into the situation and explore the potential causes and solutions.

The Core Issue: UBlock Origin Disappearing Act

The core problem, as described in the discussion, is that UBlock Origin, or in some cases UBlock Origin Lite, is being unexpectedly removed from Chrome. This is happening despite users implementing a workaround that involves launching Chrome with specific command-line arguments designed to disable features that might interfere with Manifest V2 extensions. For those unfamiliar, Manifest V2 is an older extension API that Chrome is phasing out in favor of Manifest V3.

Manifest V3 introduces significant changes to how extensions, including ad blockers, can function. These changes often restrict the capabilities of ad blockers, making it more difficult to block ads effectively. The command-line arguments mentioned – --disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disabled – are intended to prevent Chrome from enforcing the Manifest V3 restrictions and allow Manifest V2 extensions like UBlock Origin to continue working.

The fact that UBlock Origin is being removed even with these arguments in place suggests that Chrome is implementing more aggressive measures to push users towards Manifest V3 or that there are other factors at play.

Potential Causes and Explanations

Several potential explanations could account for this behavior:

1. Chrome Updates and Policy Changes

Chrome updates frequently, and these updates can include changes to extension policies and enforcement mechanisms. It's possible that a recent Chrome update has introduced new restrictions or altered the way command-line arguments are handled, rendering the workaround ineffective.

2. Manifest V3 Enforcement

Google has been gradually phasing out Manifest V2 and pushing developers to migrate to Manifest V3. While the command-line arguments are intended to bypass this, it's possible that Chrome is becoming more stringent in its enforcement, overriding these arguments in certain cases. This could be a deliberate move to force users onto Manifest V3 compliant extensions, even if those extensions are less effective at blocking ads.

3. Extension Conflicts

Conflicts with other installed extensions could also be a contributing factor. Some extensions may interfere with UBlock Origin or with the command-line arguments, causing it to be disabled or removed. This is less likely, but still a possibility worth considering.

4. Profile Corruption

In rare cases, corruption within the Chrome user profile can lead to unexpected behavior, including extensions being disabled or removed. This is usually accompanied by other issues, such as browser crashes or settings being reset.

5. Bugs and Glitches

Software is rarely perfect, and bugs can occur. It's possible that a bug in Chrome is causing UBlock Origin to be removed under specific circumstances. This is especially likely if the issue is intermittent or affects only a subset of users.

The Implications for Ad Blocking

This situation highlights the ongoing challenges faced by ad blocker developers and users. As browser developers like Google tighten restrictions on extensions, it becomes increasingly difficult to maintain effective ad blocking solutions. This has several implications:

1. Reduced Ad Blocking Effectiveness

If UBlock Origin and other similar extensions are forced to comply with Manifest V3 restrictions, their ability to block ads effectively may be significantly reduced. This could lead to a resurgence of intrusive and annoying ads, degrading the browsing experience.

2. Increased Reliance on Alternative Methods

As browser-based ad blocking becomes less effective, users may need to explore alternative methods, such as DNS-based ad blocking, VPN-based ad blocking, or using alternative browsers with built-in ad blocking features. These methods offer varying degrees of effectiveness and may have their own drawbacks, such as increased battery usage or privacy concerns.

3. Innovation in Ad Blocking Techniques

The challenges posed by Manifest V3 and other restrictions may spur innovation in ad blocking techniques. Developers may find new ways to circumvent restrictions or develop more efficient algorithms for identifying and blocking ads within the limitations imposed by browser developers.

4. The Rise of Alternative Browsers

Browsers like Brave, which have built-in ad blocking features, may become more popular as users seek alternatives to Chrome that offer a better ad-free browsing experience. This could lead to a shift in browser market share and put pressure on other browser developers to prioritize ad blocking.

Potential Solutions and Workarounds

While the automatic removal of UBlock Origin is a frustrating issue, there are several potential solutions and workarounds that users can try:

1. Reinstall UBlock Origin

The simplest solution is to simply reinstall UBlock Origin from the Chrome Web Store. This may temporarily resolve the issue, but it's likely that the extension will be removed again in the future if the underlying cause is not addressed.

2. Verify Command-Line Arguments

Double-check that the command-line arguments are correctly configured and that they are being applied when Chrome is launched. Ensure that there are no typos or other errors in the arguments. You can also try adding the arguments to the Chrome shortcut or launcher to ensure they are always applied.

3. Try a Different Ad Blocker

If UBlock Origin continues to be removed, consider trying a different ad blocker, such as AdGuard or Ghostery. While these extensions may also be affected by Manifest V3 restrictions, they may be more resilient to removal or offer alternative blocking methods.

4. Use a Different Browser

As mentioned earlier, browsers like Brave have built-in ad blocking features that are not subject to the same restrictions as Chrome extensions. Switching to a different browser may provide a more reliable ad-free browsing experience.

5. Implement DNS-Based Ad Blocking

DNS-based ad blocking, like AdBlock for Mobile, works at the network level to block ads before they even reach the browser. This method is not affected by browser restrictions and can provide a more comprehensive ad blocking solution. You can configure your device or router to use a DNS server that blocks ads, such as AdGuard DNS or NextDNS.

6. Check for Extension Conflicts

Disable other installed extensions one by one to see if any of them are interfering with UBlock Origin. If you identify a conflicting extension, you can either remove it or try to configure it to work properly with UBlock Origin.

7. Create a New Chrome Profile

If you suspect that your Chrome profile is corrupted, try creating a new profile. This will create a fresh installation of Chrome with default settings, which may resolve the issue.

8. Downgrade Chrome (Not Recommended)

As a last resort, you could try downgrading to an older version of Chrome that does not have the same restrictions on extensions. However, this is not recommended, as older versions of Chrome may have security vulnerabilities.

DNS-Based Ad Blocking: A Robust Alternative

Given the challenges faced by browser-based ad blockers, DNS-based ad blocking is becoming an increasingly attractive alternative. DNS-based ad blocking works by filtering out requests to known ad servers at the DNS level, preventing ads from being downloaded in the first place. This approach has several advantages:

1. System-Wide Protection

DNS-based ad blocking protects all devices on your network, including smartphones, tablets, computers, and smart TVs. This provides a consistent ad-free experience across all your devices.

2. Browser Independence

DNS-based ad blocking works independently of the browser, so it is not affected by browser restrictions or changes to extension policies.

3. Improved Performance

By blocking ads at the DNS level, DNS-based ad blocking can improve browsing performance by reducing the amount of data that needs to be downloaded. This can lead to faster page load times and a more responsive browsing experience.

4. Enhanced Privacy

DNS-based ad blocking can also enhance privacy by preventing ad servers from tracking your browsing activity. This can help to protect your personal information and reduce the amount of targeted advertising you see.

Setting Up DNS-Based Ad Blocking

Setting up DNS-based ad blocking is relatively simple. You can either configure your device or router to use a DNS server that blocks ads, such as AdGuard DNS or NextDNS. Here's how to do it:

On Your Device

  1. Go to your device's network settings.
  2. Find the DNS settings for your Wi-Fi or Ethernet connection.
  3. Enter the addresses of the DNS servers you want to use. For example, AdGuard DNS uses the following addresses:
    • 176.103.130.130
    • 176.103.130.131
  4. Save your changes.

On Your Router

  1. Log in to your router's administration interface.
  2. Find the DNS settings.
  3. Enter the addresses of the DNS servers you want to use.
  4. Save your changes.
  5. Restart your router.

Once you have configured DNS-based ad blocking, all devices connected to your network will automatically block ads.

What This Means for Mobile Users

For mobile users, the potential removal of UBlock Origin and other browser-based ad blockers highlights the importance of having a robust ad blocking solution that works across all apps and browsers. DNS-based ad blocking, as offered by AdBlock for Mobile, provides this comprehensive protection. By blocking ads at the network level, AdBlock for Mobile ensures that you can enjoy an ad-free experience on your iOS or Android device, regardless of the browser or app you are using.

Final Thoughts

The situation with UBlock Origin and Chrome underscores the ongoing tension between ad blockers and browser developers. While browser extensions can be effective, they are also subject to the whims of browser policies and updates. This is why it's crucial to have a backup plan, such as DNS-based ad blocking, to ensure a consistent and reliable ad-free experience.

Whether you stick with browser-based solutions, explore DNS-based options, or even consider alternative browsers, staying informed and adaptable is key to maintaining control over your online experience. The fight for an ad-free web is far from over, and users must remain vigilant in protecting their browsing experience.

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