How Adblockers Impact Your Website Analytics
Brave browser blocks 100% of standard analytics endpoints by default. Firefox Enhanced Tracking Protection is enabled for every user since 2019. Safari ITP caps first-party JS cookies to 7 days. These aren't edge cases — mainstream browsers used by over 25% of the web are actively restricting your analytics right now.
This page documents the real blocking rates by browser and audience type, what specifically gets blocked in each case, and what the data gap translates to in business terms.
Analytics Blocked by Browser / Tool
% of requests to analytics endpoints that get blocked
The Scale of Adblock Adoption
Adblock usage has grown steadily and shows no signs of slowing down. Here's what the data shows.
25-40%
Global Adblock Usage
Across all internet users worldwide, one quarter to nearly half use some form of adblock or privacy extension.
50%+
Tech Audience Rate
Among developer, IT, and tech-savvy audiences, adblock adoption regularly exceeds 50%, making analytics even less reliable.
912M+
Users With Adblockers
Over 912 million devices worldwide run adblocking software, and this number grows every year.
Growing
Year-Over-Year Trend
Browser-native blocking (Brave, Firefox ETP, Safari ITP) means adblocking grows even without extensions being installed.
How Much Data Are You Losing?
Blocking rates vary significantly by industry. The more technical your audience, the larger your data gap.
| Industry / Audience | Est. Blocked Traffic |
|---|---|
| Developer tools / SaaS | 40–60% |
| B2B software / Enterprise | 30–50% |
| Finance / Fintech | 25–35% |
| News & media | 20–35% |
| Gaming / Entertainment | 25–40% |
| E-commerce (general consumer) | 15–25% |
Estimates based on browser market share data and industry adblock adoption surveys. Your actual rate depends on your specific audience. Measure your site's data gap →
Two Types of Blocking: Extensions vs. Browser-Native
Most people think "adblock" means a browser extension. But a large share of your audience blocks analytics with no extension installed at all.
Extension-Based Blocking
Extensions like uBlock Origin, AdBlock Plus, and Privacy Badger work by loading filter lists (EasyPrivacy, uBlock's lists) and intercepting network requests that match blocked URL patterns. The user installs an extension; the extension reads the filter list and drops matching requests before they're sent.
Browser-Native Blocking (No Extension Required)
Modern browsers increasingly ship with tracking protection built in. These users block analytics without installing anything — making this the fastest-growing segment of your blocked audience.
Brave
Ships with a compiled adblock. Blocks all standard analytics endpoints by default. ~3% browser market share, rising.
Firefox ETP
Enhanced Tracking Protection enabled by default since 2019, uses Disconnect.me list. ~4% market share.
Safari ITP
Intelligent Tracking Prevention: caps third-party cookies, restricts referrer headers, limits JS-set first-party cookies to 7 days.
Edge Balanced/Strict
Blocks known trackers from Microsoft's list. Opt-in strict mode blocks analytics completely.
The Combined Impact
When you add browser-native blockers (Brave, Firefox ETP, Safari ITP) to extension users, the true blocked audience is larger than the commonly cited 25-40% figure. For tech audiences, developer tools, and SaaS products, more than half of all visitors may be invisible to your analytics. Standard analytics tools have no mechanism to recover these signals — they simply never reach the server.
How Missing Data Affects Your Business
The impact goes far beyond lower numbers in a dashboard. Missing analytics data cascades into wrong decisions and lost revenue.
Marketing ROI Miscalculation
When conversions aren't tracked, your cost-per-acquisition appears higher than reality. You might cut profitable campaigns or under-invest in channels that are actually performing well.
Wrong A/B Test Conclusions
If adblock users behave differently from non-blocker users (they often do), your A/B test results are skewed. You could be shipping the variant that actually performs worse with your full audience.
Inflated CPA in Ad Platforms
Google Ads, Facebook Ads, and other platforms optimize bidding based on reported conversions. Missing conversions means the algorithms bid incorrectly, driving up your actual acquisition costs.
Underinvestment in High-Value Channels
Tech-savvy users with adblockers are often high-value customers. If you can't see their journeys, you might underinvest in the channels and content that attract your best customers.
How to Fix the Data Gap
The only durable solution is routing blocked requests through a domain that isn't on any filter list — a first-party proxy on your own subdomain. It works for all analytics tools simultaneously, requires no server-side infrastructure, and recovers only the signals that are actually blocked.
For a technical breakdown of how filter lists work, why proxies bypass them, and a full comparison of recovery approaches, see the recovery guide.
See How Recovery WorksFrequently Asked Questions
What percentage of users have adblockers installed?
Globally, approximately 25-40% of internet users have an adblock installed. In tech-savvy audiences, this number can exceed 50%. Popular adblockers include uBlock Origin, AdBlock Plus, Brave browser, and Firefox Enhanced Tracking Protection. On mobile, browsers like Brave and Samsung Internet include built-in adblocking.
Which analytics tools are affected by adblockers?
Nearly all client-side analytics tools are affected, including Google Analytics 4, Google Tag Manager, Facebook Pixel, TikTok Pixel, LinkedIn Insight Tag, Mixpanel, Amplitude, Segment, Hotjar, FullStory, Heap, and many more. Adblockers maintain regularly updated filter lists that target tracking domains and scripts.
How does analytics data loss affect business decisions?
Missing analytics data leads to under-reporting of traffic, inaccurate conversion attribution, inflated cost-per-acquisition calculations, wrong A/B test conclusions, and poor marketing budget allocation. Teams make decisions on incomplete data without realizing it, which compounds into significant revenue impact over time.
Can Google Analytics bypass adblockers on its own?
No. Standard GA4 (gtag.js) sends data to google-analytics.com/collect, which is blocked by every major adblock and privacy filter list. Google does not provide a native first-party proxy option for GA4. Server-side tracking via Google Cloud or GTM server-side requires significant engineering setup and ongoing infrastructure costs.
Does Safari ITP block Google Analytics?
Safari's Intelligent Tracking Prevention (ITP) doesn't use filter lists like uBlock does. Instead, it restricts cross-site tracking and caps JavaScript-set first-party cookies to 7 days. While this doesn't fully block GA4 pageviews, it does break long-term attribution, user stitching across sessions, and may affect some GA4 measurement features. Users with uBlock Origin on Safari get full blocking on top of ITP.
How do I know if my analytics are being blocked right now?
The simplest check: open your site in Brave browser and compare the network requests in DevTools against a normal Chrome session. You'll see google-analytics.com requests disappearing in Brave. A more systematic approach is to compare your GA4 session counts against your server-side request logs (if available) for the same period — the gap is approximately your blocked traffic percentage.
Solutions
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