How to configure custom ad filters in Brave.

Introduction

Brave browser includes a powerful built-in ad-blocking engine based on the popular uBlock Origin infrastructure. In addition to the default blocklists, you can configure custom ad filters to block specific requests, elements, or domains. This article walks you through each step of creating, managing, and troubleshooting custom filters in Brave.

Accessing Brave’s Ad Filter Settings

Opening the Ad Blocker Dashboard

To begin, type brave://adblock in the address bar and press Enter. You will land on Brave’s Ad Blocker Dashboard, which displays enabled blocklists, custom filters, and statistics on blocked items.

Locating the Custom Filters Section

Scroll down to the “Custom filters” panel. Here you can add new rules, import filter lists, or edit existing entries. Custom filters override default blocklists and apply in the order listed.

Understanding Filter Syntax

Basic Blocklist Entries

A simple domain block rule uses the syntax:

• example.com^ – blocks all requests to example.com and its subdomains.

URL-Based Filters

You can target specific resource types with options:

• ads.example.com/banner.jsscript – blocks only JavaScript requests for banner.js.
• /tracking.gifthird-party – blocks matching GIF images from third-party contexts.

Cosmetic Filters

Cosmetic filters hide page elements via CSS selectors:

• example.com###ad-banner – hides an element with ID ad-banner on example.com.
• example.com^elemhide – hides elements matching default cosmetic rules on example.com.

Filter Syntax Summary

Adding Custom Filters

Via Brave Settings

Follow these steps to add a new filter manually:

1. Navigate to brave://adblock.
2. Find the “Custom filters” section and click Add filter.
3. Enter your rule in the text field (e.g., annoyingads.example.com^).
4. Click Save to apply.

Importing External Filter Lists

If you have a URL for a public filter list:

1. In the Dashboard, click Import filters.
2. Paste the list URL (for example, https://example.com/myblocklist.txt).
3. Check the box to enable it and click Import.

Managing Custom Filters

Editing or Removing Filters

To modify existing rules:

• Locate the rule under Custom filters.
• Click the Edit icon to update the syntax.
• Click the Delete icon to remove it entirely.

Reordering for Priority

Filter rules are applied top to bottom. Drag and drop entries within the Custom filters list to adjust priority. Place specific rules above broader ones to ensure correct blocking.

Testing and Troubleshooting

Verifying Blocked Ads

• Visit a page where ads previously appeared.
• Open the Developer Tools (press F12), select the Network tab, and reload.
• Look for requests marked “blocked” or “canceled.”

Common Issues and Solutions

• Rule not applied: Ensure no typos and that the domain pattern matches the target.
• Element still visible: Check if you need a more specific CSS selector or include elemhide.
• Performance impact: Too many complex filters can slow page rendering. Remove outdated rules.

Advanced Techniques

Using the Element Picker

Brave’s element picker lets you visually select unwanted page elements:

• Right-click the ad or section you wish to block.
• Choose Block element from the context menu.
• Adjust the selector in the prompt and confirm.

Domain-Specific Rules

Combine host and path patterns for precision:

• example.org/path/to/adscript,third-party – blocks only that script.
• .ads.example.com^subdocument – blocks frames from any subdomain of ads.example.com.

Script-Blocking and Global Exceptions

You can block all scripts on a domain then whitelist specific ones:

• example.com^script – blocks all scripts.
• @@example.com/essential.jsscript – re-allows essential.js.

Conclusion

Custom ad filters in Brave give you granular control over what loads in your browser. By understanding the syntax, organizing rules effectively, and leveraging built-in tools like the element picker, you can tailor your browsing experience for maximum speed, privacy, and comfort. For more detailed guidance, visit the official documentation at https://support.brave.com.

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