Here is a typical description of the issue users have been reporting:

Two or three times a day, sites will start to time out and not load like I've lost my network connection. When that happens I noticed that in the bottom left, Chrome says "Waiting on AdBlock extension."  If I open the Chrome Task Manager, the "Extension: AdBlock" process is running CPU at 100.

We are investigating this as a possible bug in AdBlock or Chrome. If you are experiencing this issue, it will really help if you can provide some information for our developers. Please provide the following in an email to or in a support ticket:

Next, we'd like you to check for any errors associated with AdBlock or Chrome. If either Chrome or AdBlock is unresponsive, you won't be able to do this. That's all right. Just skip to "Workarounds," below.

Check for errors associated with AdBlock:

  1. Open a new tab and visit chrome://extensions to open Chrome's extensions page.
  2. Select Developer mode in the upper right corner of the page. This makes a few more options appear.
  3. Find AdBlock in the list and click the background page link to open a "developer mode" window for AdBlock.
  4. Click the Console tab at the top of the window.
  5. Reload the page where the problem is happening. (You might need to drag the developer window out of the way.)
  6. If there are any error messages in the console window (usually in red text), paste them into your message.

Check for errors associated with Chrome:

  1. Right-click the page and select Inspect. The Chrome Developer Tools panel opens beside or below the page.
  2. Click the Console tab at the top of the new window.
  3. Reload the page.
  4. If there are any error messages in the console tab (usually in red text), paste them into your message.

Thanks for your help! Be sure to include your email address. We'll be back in touch when we have more information for you or if our developers have any follow-up questions.


One of these suggestions should help get things moving again:

  • If you can get to the Chrome Task Manager, close the unresponsive tab by ending the process that is using all the CPU.
  • If closing the tab doesn't help or Chrome is frozen or unresponsive, restart Chrome. (If Chrome is thoroughly hung, you may need to use the Windows Task Manager or MacOS Activity Monitor to end the Chrome process.)
    How to use the Task Manager in Windows 10
    How to use the Activity Monitor