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Opinion7 min read

Malicious Browser Tactics: Should Ad Blocker Slowdowns Be Illegal?

I came across a discussion about browsers deliberately slowing down users with ad blockers. Here's my take on whether this should be against the law.

T

The AdBlock Mobile Team

December 20, 2025

I recently stumbled upon a rather heated discussion online – a user was expressing their frustration with browsers seemingly employing tactics to slow down performance when ad blockers are active. This got me thinking about the ethics of such practices and whether there should be legal protections in place for users who choose to block ads.

It's a complex issue with arguments on both sides, but the core of the matter lies in user experience, control over one's browsing environment, and the potential for anti-competitive behavior.

The Alleged Ad Blocker Slowdown Tactics

Before diving into the legal aspects, let's understand what these alleged slowdown tactics might entail. While specifics can vary, common complaints include:

1. Artificially Inflated Page Load Times

Some users report that websites load significantly slower when an ad blocker is enabled compared to when ads are allowed to run. This can manifest as a noticeable delay before the main content appears or a general sluggishness when navigating the page.

2. Increased CPU Usage

Another concern is that certain websites or browsers may consume more CPU resources when an ad blocker is present. This can lead to increased battery drain on mobile devices and potentially affect the overall performance of the system.

3. Anti-Adblock Scripts

Websites often employ scripts designed to detect the presence of ad blockers. While simply detecting an ad blocker isn't inherently malicious, some scripts might go further by actively interfering with the browsing experience, such as displaying nag screens or preventing access to content.

4. Resource-Intensive Workarounds

To circumvent ad blockers, some websites might resort to techniques that consume excessive resources. For example, they might load ads as if they were part of the core content, making it difficult for ad blockers to identify and block them without disrupting the entire page.

The Case for Legal Intervention

If browsers or websites are intentionally degrading the user experience for those who choose to block ads, there's a strong argument for legal intervention. Here's why:

1. User Choice and Control

Users should have the right to control their browsing experience. If a user chooses to block ads, they are exercising a legitimate preference. Intentionally undermining that choice is a violation of their autonomy.

2. Anti-Competitive Practices

Such tactics could be viewed as anti-competitive, especially if they are employed by dominant players in the browser market. By penalizing users who block ads, these companies might be trying to force them to view ads, thereby benefiting their own advertising businesses at the expense of user choice and smaller ad-blocking companies.

3. Net Neutrality Principles

While net neutrality typically focuses on preventing ISPs from discriminating against different types of internet traffic, the same principles could be applied to browsers. Artificially slowing down or degrading the performance of websites based on whether they serve ads could be seen as a form of discrimination.

4. Consumer Protection

Laws designed to protect consumers from unfair or deceptive practices could be relevant in this context. If browsers are making false claims about performance or intentionally misleading users, they could be held accountable.

The Counterarguments

Of course, there are also arguments against legal intervention. These include:

1. Freedom to Monetize

Websites and browsers have a legitimate need to monetize their content and services. Advertising is a common way to do this, and they should have the freedom to experiment with different monetization strategies.

2. Technical Challenges

It can be difficult to determine whether a slowdown is intentional or simply the result of technical limitations or poorly optimized code. Legal intervention could stifle innovation and make it harder for websites to improve their performance.

3. The Ad Blocker Arms Race

There's an ongoing "arms race" between ad blockers and websites. Websites are constantly developing new techniques to circumvent ad blockers, and ad blockers are constantly adapting to block these techniques. Legal intervention could disrupt this dynamic and have unintended consequences.

4. Alternative Solutions

There may be alternative solutions that don't involve legal intervention. For example, browsers could provide more transparent controls over ad blocking, or websites could offer alternative monetization options, such as subscriptions or micropayments.

A More Nuanced Approach

Instead of outright banning all slowdown tactics, a more nuanced approach might be necessary. This could involve:

1. Transparency Requirements

Browsers and websites could be required to be more transparent about their ad-blocking policies and any performance implications. This would allow users to make informed decisions about whether to use an ad blocker.

2. Proportionality Principle

Any slowdown tactics should be proportional to the harm caused by ad blocking. For example, it might be acceptable to display a polite nag screen asking users to disable their ad blocker, but it would not be acceptable to intentionally cripple the website's performance.

3. Focus on Malicious Practices

Legal intervention should focus on practices that are clearly malicious or deceptive. This could include intentionally misleading users about performance or actively interfering with the browsing experience.

4. Independent Audits

Independent organizations could conduct audits of browsers and websites to assess their ad-blocking policies and performance implications. This would provide a more objective assessment of the situation.

The Role of DNS-Based Ad Blocking

This whole discussion highlights the importance of alternative ad-blocking methods, such as DNS-based blocking. Here at AdBlock for Mobile, we believe that DNS-based blocking offers several advantages over browser-based solutions:

1. System-Wide Protection

DNS-based blocking works at the network level, providing protection across all apps and browsers on your device.

2. No Browser Interference

Because it operates outside the browser, DNS-based blocking is less susceptible to browser-specific slowdown tactics.

3. Improved Privacy

DNS-based blocking can also improve your privacy by preventing your browser from communicating with ad servers.

4. Reduced Resource Consumption

By blocking ads at the DNS level, you can reduce the amount of data that your device needs to download, which can improve battery life and performance.

My Recommendations

Based on my understanding of the situation, here are my recommendations:

For Users:

  • Be aware of the potential for slowdown tactics. If you notice that a website is loading significantly slower when your ad blocker is enabled, try disabling it temporarily to see if that resolves the issue.
  • Consider using a DNS-based ad blocker. This can provide system-wide protection without interfering with your browser's performance.
  • Support websites that offer alternative monetization options. If a website offers a subscription or micropayment option, consider supporting them financially to help them continue to provide valuable content.

For Browsers:

  • Be transparent about your ad-blocking policies. Let users know if you are employing any tactics that might affect performance.
  • Provide users with more control over ad blocking. Allow users to customize their ad-blocking settings to suit their needs.
  • Work with websites to find mutually agreeable solutions. Collaborate with websites to develop monetization strategies that don't rely on intrusive advertising.

For Websites:

  • Avoid using malicious or deceptive tactics to circumvent ad blockers. This will only alienate your users.
  • Offer alternative monetization options. Give users a way to support your website without having to view ads.
  • Focus on providing high-quality content. If your content is valuable, users will be more likely to support you financially.

Final Thoughts

The issue of ad blocker slowdown tactics is a complex one with no easy answers. However, by focusing on transparency, user choice, and fair competition, we can create a browsing environment that is both enjoyable and sustainable. As users become more aware and vocal about their preferences, the industry will hopefully adapt to create a better online experience for everyone.

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