https://adblockplus.org/en/features#socialmedia
The "open this dialogue" links bring up an error page:
Unknown Protocol
One of the following (abp) is not a registered protocol or is not allowed in this context.
The address specifies a protocol (e.g. "wxyz://") the browser does not recognize, so the browser cannot properly connect to the site.
- Are you trying to access multimedia or other non-text services? Check the site for extra requirements.
- Some protocols may require third-party software or plugins before the browser can recognize them.
There's an old thread on the AdBlock Plus forums about this but it didn't go very far:
https://adblockplus.org/forum/viewtopic.php?t=10613
Anyone else seen this?