Ublock Origin Not Blocking Twitch Ads? Fixes That Work

If uBlock Origin is not blocking Twitch ads, the fix usually involves updating the filter lists, enabling the “uBlock filters – Twitch” list, or switching from Manifest V2 to a supported browser version. Twitch actively changes its ad delivery methods, so a filter list that worked yesterday may fail today. Below are the specific reasons this happens and the steps that restore ad blocking.

Why Twitch Ads Slip Through uBlock Origin

Twitch uses several techniques that make ad blocking harder than on most websites:

• Server-side ad insertion: Ads are stitched into the video stream itself, so the browser sees them as part of the content, not as a separate request that can be blocked.
• Frequent changes to ad endpoints: Twitch rotates the URLs and scripts that serve ads, often several times per week, breaking static filters.
• Pre-roll and mid-roll ads: These appear at the start or during a stream, and some are delivered through the same CDN as the stream itself.
• Manifest V3 migration: Chrome and other Chromium browsers are phasing out the older extension system (Manifest V2) that uBlock Origin relies on for its most powerful blocking methods. Firefox still supports MV2, which is why uBlock Origin works better there.

First Steps: Update Filters and Enable Twitch-Specific Lists

Outdated filter lists are the most common cause. Here is what to do:

1. Click the uBlock Origin icon in your browser toolbar.
2. Click the gear icon (Dashboard) to open settings.
3. Go to the Filter lists tab.
4. Click Update now at the top. Wait for the update to finish.
5. Scroll down to the uBlock filters section and make sure the uBlock filters – Twitch checkbox is enabled. If it is not, enable it and click Apply changes.
6. After updating, purge the cache: in the same Filter lists tab, click Purge all caches, then click Update now again.

This forces a full refresh of all filter rules, which often resolves the issue within a few minutes.

Switch to Firefox or a Maintained Browser Fork

If you are using Chrome, Edge, or Brave, uBlock Origin is severely limited because those browsers now require Manifest V3 extensions. The original uBlock Origin is not fully compatible with MV3; you may be using the less effective “uBlock Origin Lite” or a version that cannot use its advanced network-filtering engine.

Firefox still supports Manifest V2, so uBlock Origin works there with full capability. If you want to stay on a Chromium browser, consider a fork like uBlock Origin Lite, but understand it will not block Twitch ads as reliably because it lacks the dynamic filtering and scriptlet injection that the full version provides.

Use a Twitch Ad-Blocking Script or Extension

When filter lists fail, the next level is a userscript that intercepts Twitch’s ad player. The most well-known is TTV LOL (or its successor, ttv-lol), which works as a browser extension or userscript. It replaces the ad segments with a blank screen or a “Ad blocked” message while keeping the stream audio/video uninterrupted.

To install it with uBlock Origin:

1. Go to the TTV LOL GitHub page and copy the userscript URL.
2. In uBlock Origin’s dashboard, go to the My filters tab.
3. Add the line: twitch.tv##+js(twitch-videoad.js) (this is a scriptlet that disables the ad player).
4. Alternatively, install the TTV LOL extension from the browser’s add-on store.

Note that Twitch occasionally breaks these scripts, so you may need to update them manually or wait for the developer to push a fix.

Clear Browser Cache and Cookies for Twitch

Sometimes stale cached data interferes with uBlock Origin’s filters. This is especially true if you have visited Twitch many times before updating filters. Clear the cache and cookies specifically for twitch.tv:

1. Click the padlock icon in the address bar (or the three-dot menu).
2. Go to Site settings.
3. Click Clear data.
4. Reload Twitch.

This does not reset your login or preferences, but it forces the site to reload all scripts fresh, which can help uBlock Origin apply its rules correctly.

Common Mistakes and Misconceptions

• Using uBlock Origin Lite instead of the full version: The Lite version is a different extension with fewer features. Make sure you have the full uBlock Origin installed, not the Lite variant.
• Thinking all ads are blockable: Twitch’s server-side ad insertion means that some ads are literally part of the video stream. No browser extension can remove those without breaking the stream itself. What uBlock Origin and TTV LOL do is block the ad player and replace it with a placeholder, not remove the ad frames from the video data.
• Expecting 100% success: Twitch is in an arms race with ad blockers. Sometimes no solution works for a few days after Twitch changes its infrastructure. Patience and regular updates are part of the process.

Alternative Approaches and Their Trade-offs

If uBlock Origin alone is not enough, consider these alternatives:

• Twitch Turbo or Amazon Prime: These paid subscriptions remove ads on Twitch officially. Twitch Turbo costs a monthly fee, and Prime Gaming (included with Amazon Prime) gives you one free channel subscription per month, which removes ads on that channel only.
• Alternative frontends: Some third-party apps and websites proxy Twitch streams without ads, but they often violate Twitch’s terms of service and may stop working without notice.
• VPN to a region with fewer ads: Not reliable, as Twitch serves ads based on your account and network, not just location.
• Use a dedicated ad-blocking DNS: Services like NextDNS or AdGuard DNS can block some ad domains, but they cannot block server-side inserted ads.

Frequently Asked Questions

Why does uBlock Origin work on YouTube but not Twitch?

YouTube ads are delivered through separate requests that can be blocked by URL filters. Twitch uses server-side ad insertion, meaning the ad is embedded in the same video stream you are watching. This makes it much harder to distinguish ad content from regular stream content, so traditional filter lists are less effective.

Is it legal to block Twitch ads?

Yes, using ad blockers is legal in most countries. However, it violates Twitch’s Terms of Service, which could result in your account being restricted if Twitch detects the blocker. In practice, Twitch rarely bans users for ad blocking, but it is a possibility.

Will uBlock Origin ever work perfectly on Twitch again?

It depends on Twitch’s future technical choices. If Twitch continues with server-side ad insertion, no client-side blocker will be 100% effective. However, the open-source community often finds workarounds, so expect intermittent success rather than a permanent fix.

Does uBlock Origin slow down my browser on Twitch?

No, uBlock Origin is designed to be lightweight and has a very low memory footprint. The main performance impact comes from Twitch’s own scripts, not the blocker. If you notice slowdowns, try disabling other extensions that may conflict.

Can I whitelist Twitch and still block ads on other sites?

Yes, you can add twitch.tv to uBlock Origin’s whitelist (in the Dashboard, under “Trusted sites”). That will disable all blocking on Twitch, but you will see ads there. If you want to keep blocking on other sites, that is the simplest way.

What is the best browser for uBlock Origin and Twitch?

Firefox is currently the best choice because it still supports Manifest V2 extensions, allowing uBlock Origin to use its full feature set. Waterfox and other Firefox forks also work. Chromium browsers like Chrome and Edge are not recommended for Twitch ad blocking due to MV3 limitations.

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