Getting net ERR BLOCKED BY CLIENT error on some AJAX calls

Question

Recently I've realized that some ad blocker extensions such as adBlocker plus block some Ajax calls. I get this error on the console:

GET http://localhost/prj/conn.php?q=users/list/ net::ERR_BLOCKED_BY_CLIENT

Why does it block some Ajax call but not the others and what causes that? Is there any workaround other than telling users to turn off the ad blocker?

Answer 1

Matching the URLs against a type of expression are one of the primary rules of AdBlocker. However, while instructing the users to disable their given extensions on a site, you could also get the extension of the rules which provided the extension enough details about it. Once you identify the culprit, you can either try to avoid triggering the rule by using different URIs, report the rule as incorrect or overly-broad to the team that created it, or both. Check the docs for a particular add-on on how to do that.For example, AdBlock Plus has a Blockable items view that shows all blocked items on a page and the rules that triggered the block. And those items also include XHR requests. The screenshot below has been shared for reference:-