Done. It connects to the endpoint and you can leave it open.
version: '3.3'
services:
firefox:
container_name: firefox
ports:
- '5800:5800'
volumes:
- '<host folder path>:/config:rw'
image: jlesage/firefox
<ip-address>:5800
and finish the firefox setupIn order to develop locally you need to use guide provided by Mozilla: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Your_first_WebExtension#trying_it_out and follow next steps:
about:debugging
in Firefox