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Page: About "This other extension reports more stuff blocked!"
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2014 07 22: uBlock and others: Blocking ads, trackers, malwares About "This other extension reports more stuff blocked!" About "Why uBlock Origin works so much better than Pi‑hole does?" About "uBlock is inferior in capabilities as a result of being lighter on the browser"... About "uBlock is inferior in capabilities as a result of being lighter on the browser" About Google Chrome's "This extension may soon no longer be supported" About Safari and Canary support About the Wiki documentation About the required permissions About this "your software" mindset Advanced settings Advanced user features Badware risks Behind the scene network requests Block more, way more Blocking mode Blocking mode: easy mode Blocking mode: hard mode Blocking mode: medium mode Blocking mode: nightmare mode Blocking mode: very easy mode Can uBO crash a browser? Can you trust uBlock Origin? Can you trust uBlock? Change log Cloud storage Code viewer Compare: Memory footprint: what happens inside µBlock after installation Contributed memory usage: benchmarks over time Cosmetic filtering in uBlock: version 0.4.0.0 update Cosmetic filtering in µBlock: version 0.4.0.0 update Counterarguments DOM inspector Dashboard Dashboard: 3rd party filters Dashboard: Filter lists Dashboard: My filters Dashboard: My rules Dashboard: Settings Dashboard: Support Dashboard: Trusted sites Dashboard: Whitelist Debunking "uBlock Origin is less efficient than Adguard" claims Deploying uBlock Origin Deploying uBlock Origin: configuration Disable hyperlink auditing beacon Does uBO have a parental control or password protection? Does uBO protect against fingerprinting? Does uBlock Origin block ads or just hide them? Does uBlock block ads or just hide them? Doesn't uBlock Origin add overhead to page load? Dynamic filtering: Benefits of blocking 3rd party script and iframe tags Dynamic filtering: Usefulness of blocking 1st party script tags Dynamic filtering: Usefulness of blocking inline script tags Dynamic URL filtering Dynamic filtering examples Dynamic filtering Dynamic filtering: Benefits of blocking 3rd party iframe tags Dynamic filtering: Examples of usefulness of blocking 3rd party iframe tags Dynamic filtering: default deny Dynamic filtering: default deny: useful rulesets Dynamic filtering: precedence Dynamic filtering: quick guide Dynamic filtering: rule syntax Dynamic filtering: to easily reduce privacy exposure Element picker Element zapper Experimental features Experimental filters Few words about re‐design of uBO's user interface Filter Performance Filter list licenses Filter lists from around the web Filter syntax extensions Firefox WebExtensions Firefox version: benchmarking memory footprint (2015 03 07) Firefox version: benchmarking memory footprint History of vulnerability disclosures Home How to ... How to mark a web site as trusted How to whitelist a web site Inline script tag filtering Introduction to basic filtering syntax Keyboard shortcuts Launch and filter lists load performance Maintainership transfer of uBlock: post mortem Manually editing per site switches Memory footprint: what happens inside uBlock after installation Memory footprint: what happens inside µBlock after installation Myth: uBlock consumes over 80MB Myth: uBlock consumes several or several dozen GB of RAM Myth: uBlock is just slightly less resource intensive than Adblock Plus Myth: µBlock consumes over 80MB Myth: µBlock is just slightly less resource intensive than Adblock Plus Notes on memory benchmarks, selfies Overview of uBlock's network filtering engine Overview of uBlock's network filtering engine: details Own memory usage: benchmarks over time Per site switches Permissions Prevent WebRTC from leaking local IP address Privacy policy Privacy stuff Privileged Pages Procedural cosmetic filters Quick guide: popup user interface Reference answers to various topics seen in the wild Reference benchmark Reference description of uBO in various extensions stores Regular expression based filters Resources Library Scientific papers Software known to have uninstalled uBlock Origin Static filter syntax Strict blocking Syntax quirks Technical inaccuracies from around the web The "Report a filter issue" form The context menu The logger The network request logger Tips and tricks waterfall Toolbar icon Tools Troubleshooting Tutorial: how to unbreak a site using the dynamic filtering pane Unofficial websites Various videos showing side by side comparison of the load speed of complex sites Who care about efficiency, I have 8 GB and|or a quad core CPU Who cares about efficiency, I have 8 GB RAM and|or a quad core CPU Who cares about efficiency, I have 8 GB and|or a quad core CPU Why don't you accept donations? uBlock Origin Core (Node.js) uBlock Origin is completely unrelated to the web site ublock.org uBlock Origin works best on Firefox uBlock and others: Blocking ads, trackers, malwares uBlock version 0.8.5: many changes uBlock vs. ABP: efficiency compared µBlock and others: Blocking ads, trackers, malwares µBlock version 0.8.5: many changes µBlock vs. ABP: efficiency compared
22 About "This other extension reports more stuff blocked!"
krystian3w edited this page 2022-11-29 12:45:52 +01:00

TL;DR: Do not rely on the number shown over an extension badge to judge blocking power to assess how well your privacy is protected. Doing so would fool you big time.

For both Adblock Plus (ABP) and uBlock Origin (uBO) (and many other such extensions), the badge on the icon reports the number of net requests blocked by the extension.

Sometimes one extension can report more stuff blocked than the other on the same page, while the reality could be the opposite.

The fewer the extension blocks, the higher the number of network requests. The higher the number of these, the more likely some will need to be blocked. Occasionally you end up with more network requests blocked, as shown by the badge, while internally, additional network requests were allowed for the web page.

For me, it's ultimately the benchmarks I run to report blocking power that tells the real story. The badge is not a good way to assess the blocking ability of an extension, as you could conclude the opposite of what is happening.

If you don't want to run a benchmark, I have this little online tool with which you can find out the requests which were not prevented from leaving your browser. Use it by opening the dev console for the page you want a report from and going to the Network tab. Edit: since then, I have created uBO-Scope, an extension whose purpose is to inform you about what was not blocked.

Clear the browser cache by right-clicking somewhere in the Network tab console. Force a reload of the web page. Right-click in the Network tab console and select "Copy all as HAR". Paste the result in the text area on this online tool, and click Parse. It will show the hostnames that were hit by the browser for the particular page you loaded.

For example, for the front page of https://www.cnet.com/, uBO shows ten requests blocked, while ABP shows sixteen requests blocked (both have a lot of filter lists). Here is what happened internally:

Remote servers reached:

ABP:

  • dw.cbsi.com
  • cnet3.cbsistatic.com
  • cnet4.cbsistatic.com
  • fonts.cnet.com
  • urs.cnet.com
  • www.cnet.com
  • 1ab45d4854fe036a37ff-6643978b1699ef52a80b7f45a7bcfe3d.r85.cf2.rackcdn.com
  • www.googletagservices.com
  • zor.livefyre.com
  • platform.twitter.com
  • s.yimg.com
  • dw.cbsimg.net
  • geo.query.yahoo.com

uBO:

  • dw.cbsi.com
  • cnet3.cbsistatic.com
  • cnet4.cbsistatic.com
  • fonts.cnet.com
  • urs.cnet.comg
  • www.cnet.com

uBO caused the browser to hit far fewer remote servers. Meaning it blocked more, yet its badge displayed a lower number of requests blocked.

So the point is, do not rely on the badge to judge blocking power to assess how well your privacy is protected. Doing so would fool you big time.

On the other hand, blocking too much may "break" some aspects of a website, so in the end, as long as you understand what is happening under the hood, you can make informed choices.

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uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.