Using this extension, you can search for FB groups joined by you that don't have an admin and claim its adminship.
"Claim FB Group Adminship (PRO)" allows users to search for FB groups joined by them
that don't have an admin and claim its adminship.
Instead of manually checking whether a group is abandoned by its Admin, a user
can automate this process by using this extension.
This tool does not work for groups that don't display "claim adminship" option.
This software is neither created nor endorsed by Facebook.
Privacy notice: This software neither collects nor transmits any personally identifiable information. This software does not track your browsing behaviour. Information necessary for functioning of this software is stored on the devices of end user, our servers do not have access to this information. All information required for functioning of this software is kept between end-user and Facebook servers.
Terms of service: https://www.gethappysoftware.com/tos/