Flagfox 6.1.18 for Firefox 60+ has been released and will be available for update and download from AMO as soon as it is approved by Mozilla.
Flagfox 6.1.18 changelog:
- IPv4 & IPv6 address location database updates for September 2019
I had planed to update the API used to run user-JS in custom actions to use a newly created one, but I didn’t yet. It is delayed until whenever it is that I actually finish that. For now, this is just the routine monthly IPDB update.