uBlock Origin vs Adblock Plus: Which Is Faster?
uBlock Origin is generally faster and lighter than Adblock Plus, making it the better choice if you want a free ad blocker that uses less memory and CPU. This article compares both extensions on speed, features, and usability so you can decide which one fits your browsing habits.
Background: Two Different Approaches
uBlock Origin and Adblock Plus are both free, open-source browser extensions that block ads, but they were built with different philosophies. Adblock Plus (ABP) launched in 2006 and became popular because it was easy to use and offered “acceptable ads� by default – meaning it allows some non-intrusive ads unless you disable that option. uBlock Origin, created in 2014 by Raymond Hill, was designed from the start to be extremely efficient, using as little CPU and memory as possible. It also blocks ads by default without any “acceptable ads� whitelist.
This difference in philosophy directly affects performance. uBlock Origin’s code is leaner, and it uses a more efficient filtering engine. Many users report that uBlock Origin feels snappier on low-end computers and reduces page load times noticeably.
How They Work: Filter Lists and Blocking Engines
Both extensions use filter lists – collections of rules that tell the browser which URLs to block. The most common lists are EasyList (for ads) and EasyPrivacy (for trackers). However, uBlock Origin also supports additional lists like uBlock filters, which are maintained by its community.
The key difference is how the rules are applied. Adblock Plus historically used a JavaScript-based engine that checks each network request against the filter lists. uBlock Origin uses a more optimized approach: it compiles filter lists into a highly efficient data structure (a “pattern� matcher) that runs much faster. This means uBlock Origin can check thousands of rules with less overhead.
In practice, this translates to lower CPU usage and faster page rendering. Independent benchmarks (like those from AdGuard and various tech blogs) have consistently shown uBlock Origin using less memory and blocking more requests per second than Adblock Plus.
Speed and Resource Usage: What the Numbers Say
When people ask “which is faster?�, they usually mean two things: how quickly pages load, and how much memory/CPU the extension uses. uBlock Origin wins on both counts.
- Memory footprint: uBlock Origin typically uses 20-40 MB of RAM in Chrome, while Adblock Plus can use 50-100 MB or more, especially with many filter lists enabled.
- CPU usage: uBlock Origin’s efficient matching engine causes less CPU spikes during page loads. Adblock Plus occasionally shows higher CPU usage on complex pages.
- Page load time: Because uBlock Origin blocks requests earlier in the network stack, pages often finish loading faster. Some tests show a 10-20% reduction in load time with uBlock Origin compared to ABP.
These differences are more noticeable on older or less powerful devices. On a modern desktop with plenty of RAM, the gap may be imperceptible, but uBlock Origin still tends to feel more responsive.
How to Choose: Which One Should You Use?
Your choice depends on your priorities:
- Choose uBlock Origin if: you want maximum performance, don’t mind configuring a few settings, and prefer to block all ads by default (including “acceptable ads�).
- Choose Adblock Plus if: you want a more beginner-friendly interface, like the idea of supporting websites through “acceptable ads�, or need specific features like domain whitelisting that ABP offers more visibly.
Both are free, so cost isn’t a factor. uBlock Origin is also available for more browsers (Chrome, Firefox, Edge, Opera, Safari via a separate app) and has a version for Android (Firefox). Adblock Plus is available for all major browsers as well.
Common Problems and Misconceptions
A frequent misconception is that uBlock Origin is “harder to use� because it has more advanced settings. In reality, the default configuration works well for most people – you install it and it blocks ads immediately. The advanced settings are optional.
Another issue: some websites detect ad blockers and ask you to disable them. Both extensions offer an “element picker� to manually hide elements, and you can whitelist specific sites. uBlock Origin has a “cosmetic filtering� mode that can hide anti-adblock messages, but this requires updating filter lists regularly.
Also, note that uBlock Origin is not the same as “uBlock� (the original project). The original uBlock was discontinued; uBlock Origin is the actively maintained fork. Make sure you download from the official browser store to avoid fake versions.
Safety and Privacy Considerations
Both extensions are open-source, which means their code is publicly auditable. uBlock Origin has a strong reputation for not collecting any user data and not selling anything. Adblock Plus is also open-source, but it has a business model: it runs the “Acceptable Ads� program where advertisers pay to be whitelisted. This doesn’t affect your privacy, but some users dislike the idea of paying to allow ads.
For privacy-focused users, uBlock Origin is often recommended because it blocks trackers more aggressively and has a built-in “block large media elements� feature that can further reduce data usage. It also offers a “hard mode� that blocks more third-party requests by default.
Frequently Asked Questions
Is uBlock Origin really faster than Adblock Plus?
Yes, in most benchmarks and real-world usage, uBlock Origin uses less memory and CPU, and can make pages load faster. The difference is most noticeable on lower-end devices.
Does Adblock Plus slow down my browser?
It can, especially if you enable many filter lists. Adblock Plus is not slow per se, but it uses more resources than uBlock Origin. If you have a modern computer, you might not notice a difference.
Can I use both extensions at the same time?
It’s not recommended. Running two ad blockers can cause conflicts, duplicate blocking, and increased memory usage. Pick one and stick with it.
Do these extensions work on YouTube?
Yes, both block video ads on YouTube. However, YouTube occasionally changes its ad delivery, so you may need to update your filter lists. uBlock Origin often gets updates faster.
Are there any free alternatives that are even faster?
Some users prefer Brave Browser, which has built-in ad blocking and is based on Chromium. Also, AdGuard offers a standalone app, but it’s not completely free for all features. uBlock Origin remains the top choice for a free, lightweight extension.
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