Is AdBlocker legal? Can&#39;t we get a legal action about AdBlocker as web masters?
<blockquote>
  <p>AdBlock is one of the most popular ad blockers worldwide with more
  than 60 million users on Chrome, Safari, Firefox, Edge as well as
  Android.</p>
</blockquote>

<p>We have calculate that one of our site loss almost $10,000 each year because of AdBlocker.</p>

<p>Simply what they do is, they remove the advertisement which are on our website when a user who use Adblocker visits.</p>

<p>So as a third party, they change the website content just before display it to the user.</p>

<p>Is it legal? Can't we get a legal action about AdBlocker as web masters?</p>

<blockquote>
  <p>Can't we get a legal action about AdBlocker as web masters?</p>
</blockquote>

<p>No. I assume that by "web master" you mean a server admin who contracts with entities which are seeking to advertise their goods and services.</p>

<p>An advertiser pays the server to transmit (or send(), in terms of a socket API) certain content to whoever submits a GET or POST request ("the client"). The scope of the contract ends there, and the end consumer or client is not a party to that contract. Any point beyond the server admin's routers, it is perfectly lawful for <em>end users</em> to run some program <em>on the client side</em> where the purpose of that program is to (1) parse any packets received in the client socket, (2) filter out some of it, (3) and forward the rest to a browser.</p>

<p>Bringing legal action against AdBlocker would be somewhat akin to suing producers of TV remote controls under the allegation that the <em>mute button</em> functionality blocks advertisement content.</p>

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