ERR_TOO_MANY_REDIRECTS and Ad Blockers: A Deep Dive

I recently came across an interesting discussion about a frustrating issue: the dreaded ERR_TOO_MANY_REDIRECTS error in Chrome, seemingly triggered by the popular ad blocker uBlock Origin. The user described encountering this error intermittently when performing Google searches, with the browser briefly displaying the error page before eventually resolving and displaying the search results. This got me thinking about the complex interplay between ad blockers, website security, and browser behavior, especially on mobile devices.

Let's dissect this issue and explore potential causes, solutions, and preventative measures.

Understanding ERR_TOO_MANY_REDIRECTS

Before diving into the specifics of ad blockers, it's crucial to understand what the ERR_TOO_MANY_REDIRECTS error signifies. This error occurs when a website redirects the browser in a loop, meaning the browser is sent from one page to another and back again repeatedly, without ever reaching the intended destination. Eventually, the browser gives up and displays the error message.

Several factors can cause redirect loops, including:

• Misconfigured website redirects: This is the most common cause. Website administrators might accidentally create redirect rules that point back to the original page, creating an endless loop.
• Cookie issues: Cookies store information about your browsing session. If cookies are corrupted or conflicting, they can interfere with the redirect process.
• Server problems: Temporary server outages or misconfigurations can also lead to redirect errors.
• Browser cache: An outdated or corrupted browser cache can sometimes cause redirect issues.
• Extension conflicts: Browser extensions, including ad blockers, can sometimes interfere with website redirects.

Ad Blockers and Redirects: A Complex Relationship

While ad blockers are designed to enhance the browsing experience by blocking unwanted content, they can sometimes inadvertently trigger redirect errors. Here's how:

• Overly aggressive filtering: Ad blockers rely on filter lists to identify and block ads and trackers. If a filter list is too aggressive or contains incorrect rules, it might block legitimate website resources, including those necessary for proper redirection.
• Interference with anti-ad blocking measures: Some websites employ techniques to detect and circumvent ad blockers. If an ad blocker attempts to block these measures, it could inadvertently trigger a redirect loop.
• Script conflicts: Ad blockers inject scripts into web pages to modify their behavior. These scripts can sometimes conflict with website scripts, leading to unexpected behavior, including redirect errors.

Analyzing the uBlock Origin Scenario

In the scenario described, the user suspects that uBlock Origin is the culprit behind the redirect errors during Google searches. While it's impossible to definitively confirm the cause without further investigation, here are some plausible explanations:

• Filter list issues: It's possible that one of the filter lists used by uBlock Origin is blocking a resource that Google uses for redirection. This is more likely to occur if the user has enabled multiple filter lists or custom filter lists.
• Conflict with Google's anti-ad blocking measures: Google actively combats ad blockers on its platform. It's conceivable that uBlock Origin's attempts to block ads on Google search pages are triggering a redirect loop as a defensive mechanism by Google.
• Browser-specific issue: The issue might be specific to Chrome or a particular version of Chrome. Browser updates can sometimes introduce compatibility issues with extensions.

Troubleshooting ERR_TOO_MANY_REDIRECTS with Ad Blockers

If you're experiencing ERR_TOO_MANY_REDIRECTS errors and suspect your ad blocker is to blame, here's a systematic approach to troubleshooting:

1. Disable Your Ad Blocker (Temporarily)

The first step is to disable your ad blocker entirely and see if the error disappears. If the error goes away, it's a strong indication that the ad blocker is indeed the cause.

2. Clear Browser Cache and Cookies

Corrupted cache and cookies can sometimes interfere with website redirects. Clearing your browser's cache and cookies can resolve these issues. In Chrome, you can do this by going to Settings > Privacy and security > Clear browsing data.

3. Update Your Ad Blocker

Ensure that you're using the latest version of your ad blocker. Developers often release updates to fix bugs and improve compatibility with websites.

4. Update Your Browser

Similarly, make sure your browser is up to date. Browser updates often include security patches and bug fixes that can resolve compatibility issues with extensions.

5. Check Your Ad Blocker's Filter Lists

Examine the filter lists enabled in your ad blocker. Try disabling recently added or less reputable filter lists to see if that resolves the issue. You can also try manually updating the filter lists to ensure you have the latest versions.

6. Whitelist the Website

If you only encounter the error on specific websites, try whitelisting those websites in your ad blocker. This will prevent the ad blocker from interfering with those sites.

7. Experiment with Ad Blocker Settings

Some ad blockers offer advanced settings that allow you to fine-tune their behavior. Experiment with these settings to see if you can resolve the issue without disabling the ad blocker entirely. For example, you might try disabling specific blocking features or adjusting the level of filtering.

8. Try a Different Ad Blocker

If you've exhausted all other troubleshooting steps, consider trying a different ad blocker. It's possible that the issue is specific to the ad blocker you're currently using.

9. Reset Your Browser

As a last resort, you can try resetting your browser to its default settings. This will disable all extensions and clear all settings, which can sometimes resolve persistent issues.

Specific Recommendations for Mobile Ad Blocking

While the general troubleshooting steps apply to both desktop and mobile devices, here are some specific considerations for mobile ad blocking:

DNS-Based Blocking

If you're using DNS-based ad blocking on your mobile device (which we generally recommend), the troubleshooting process is slightly different. Instead of focusing on browser extensions, you'll need to examine your DNS configuration.

• Verify DNS Settings: Double-check that you've correctly entered the DNS server addresses provided by your chosen ad blocking service (e.g., NextDNS, AdGuard DNS, Quad9). A typo can easily lead to connectivity issues.
• Test with Different DNS Servers: If you're experiencing problems, try switching to a different set of DNS servers from the same provider or a different provider altogether. This can help determine if the issue is specific to a particular DNS server.
• Check for Service Outages: Ad blocking services can sometimes experience outages. Check the service's status page or social media channels to see if there are any known issues.

App-Based Ad Blockers

If you're using a local VPN app for ad blocking on Android, the troubleshooting steps are similar to those for browser extensions.

• Update the App: Ensure that you're using the latest version of the app.
• Check Filter Lists: Examine the filter lists used by the app and try disabling recently added or less reputable lists.
• Experiment with Settings: Explore the app's settings to see if you can fine-tune its behavior.
• Clear App Cache: Clearing the app's cache can sometimes resolve issues.

iOS Content Blockers

For Safari content blockers on iOS, the troubleshooting steps are relatively straightforward.

• Disable and Re-enable: Try disabling and then re-enabling the content blocker in Safari's settings.

• Update the App: Make sure the content blocker app is up to date.

Preventing Future Redirect Errors

While it's impossible to completely eliminate the risk of encountering ERR_TOO_MANY_REDIRECTS errors, here are some preventative measures you can take:

• Use Reputable Ad Blockers: Stick to well-known and reputable ad blockers with a proven track record.
• Keep Your Software Updated: Regularly update your browser, ad blocker, and operating system.
• Be Cautious with Filter Lists: Avoid using overly aggressive or untrusted filter lists.
• Whitelist Trusted Websites: If you consistently encounter issues on specific websites, consider whitelisting them in your ad blocker.
• Monitor Your Browser Extensions: Regularly review your browser extensions and remove any that you no longer need or trust.

The Importance of Balanced Ad Blocking

The ERR_TOO_MANY_REDIRECTS error highlights the delicate balance between effective ad blocking and maintaining a smooth browsing experience. While blocking ads can significantly improve page load times, reduce data usage, and enhance privacy, overly aggressive blocking can inadvertently interfere with website functionality and lead to frustrating errors.

It's crucial to choose an ad blocking solution that offers a good balance of effectiveness and compatibility. Experiment with different settings and filter lists to find what works best for you. And remember, you can always whitelist websites that you trust or that are experiencing issues.

Ultimately, the goal is to create a browsing environment that is both enjoyable and respectful of website publishers. By understanding the potential pitfalls of ad blocking and taking appropriate preventative measures, you can minimize the risk of encountering errors like ERR_TOO_MANY_REDIRECTS and enjoy a smoother, more secure online experience.