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So, I noticed some other posts related to this (such as Full-page ads randomly pop up in Chrome ("Sponsored by")); however, since I have an extension that is only injecting an ad once in every 500 or so URLs, I want to know WHICH extension is causing this.

The issue is that every (random) hundred or so URLs I hit (including pages I've written myself) present an ad and create an iframe for my content. NOT OK!

However, short of process of elimination, is there a way (through DevTools or something) to see which extensions are firing?

Thanks!

Shnor W.
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2 Answers2

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In Google Chrome, you can disable each extension one at a time and determine what extension is causing the issue.

Austin
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  • Yes, that's the trial-and error method (which I don't want to use, if possible) since - given the low frequency of injections, I will have to run without extensions for a long period of time to find it. – Shnor W. Jun 07 '19 at 20:34
  • What operating system are you using? Chrome has an extension activity logging mode which I think can only be accessed via a command line. – Austin Jun 07 '19 at 21:06
  • Windows 10 Build 17134 – Shnor W. Jun 07 '19 at 21:11
  • I don't know if extension activity logging will help you, but if you'd like to use it, you can enable it with the [instructions on this page](https://www.ghacks.net/2019/02/23/google-chrome-activity-log-for-extensions/). The instructions in the article are for Chrome Canary, but the article is about 4 months old, so I am assuming it is available on the current stable release of Chrome. – Austin Jun 07 '19 at 21:23
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Sorry about the delay on this, but answering my own question, I found that it was not an extension, but my ISP was injecting HTML on port 80 (never happened under SSL). (BEWARE OPTIMUM USERS: in some markets, they are injecting HTML ads when you request a site). I confirmed this with Optimum and they stated that it does not violate their policies (however, they have since shut it off in my area).

Shnor W.
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