Opened on 02/02/2019 at 08:15:01 PM

Closed on 02/04/2019 at 09:03:27 AM

Last modified on 02/04/2019 at 09:04:09 AM

#7255 closed defect (invalid)

Double pipe causes rule not to match

Reported by: carpetbrain Assignee:
Priority: Unknown Milestone:
Module: Unknown Keywords:
Cc: mapx Blocked By:
Blocking: Platform: Firefox
Ready: no Confidential: no
Tester: Unknown Verified working: no
Review URL(s):



I am using Adblock Plus version number 3.4.3 in Firefox on GNU/Linux.

I want to hide the <div> element with the class community-bulletin, on the,, domains and their subdomains.

First attempt (OK)

The following rules succeed in blocking the desired element on those domains, but risk false positives such as matching such an element on,,


Second attempt (possible bug)

To reduce the risk of false positives, I tried using the following rules instead, but neither of them succeed in blocking the <div> element with the class community-bulletin:





So, it seems to me that either:

You might want to block as well as and You can do this by putting two pipe symbols in front of the filter. This ensures that the filter matches at the beginning of the domain name: ||, and blocks all of these addresses while not blocking or http://gooddomain.example/analyze?

  • or I have misunderstood the documentation
  • or there is a bug in this version of Adblock Plus.

Attachments (0)

Change History (3)

comment:1 Changed on 02/04/2019 at 09:02:24 AM by mapx

You make a confusion between blocking filters and hiding filters.
Pipe symbol is used only for the blocking ones.

In your case (hiding filters) you cannot use pipe symbol (the first part of the filter will always match a domain and not a part of it).
So, wont ever match

Last edited on 02/04/2019 at 09:04:09 AM by mapx

comment:2 Changed on 02/04/2019 at 09:03:02 AM by mapx

  • Cc mapx added

comment:3 Changed on 02/04/2019 at 09:03:27 AM by mapx

  • Resolution set to invalid
  • Status changed from new to closed

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