There is a problem it is only a temporary solution here is the process: I have no "Manage Your Extensions" only "Debug Add-ons". enter Manage Your Exten

There is a problem it is only a temporary solution here is the process: I have no "Manage Your Extensions" only "Debug Add-ons". enter Manage Your Extensions click gear icon select Debug Add-ons about:debugging#/runtime/this-firefox select Temporary Add-on Select the manifest.json locate the file click Open done works OK Once I restart it has reverted and gone