Yep, that's the provided workaround. If you don't want to use Firefox Nightly, these Firefox forks based on the stable channel have access to all of https://addons.mozilla.org through the same steps:

- Mull: https://f-droid.org/en/packages/us.spotco.fennec_dos/

- Fennec F-Droid: https://f-droid.org/en/packages/org.mozilla.fennec_fdroid/

- Iceraven: https://github.com/fork-maintainers/iceraven-browser