How about IronFox?

It is a good idea to subscribe to the LibreWolf community!
[email protected]

How about using a password manager? I think KeePassXC is useful with its keyboard shortcuts.

Password managers
We suggest that you use a more robust solution than the built-in password manager available in the browser:

• Bitwarden: open source password manager that allows for synchronization across multiple devices.
• KeePassXC-Browser: official browser plugin for the open source password manager KeePassXC.

Recommended Addons – LibreWolf
https://librewolf.net/docs/addons/#password-managers

IronFox would work for you.

Will you provide an Android version of LibreWolf?
At the moment nobody is working on it, and it is not something we have considered investing time in. We recommend using IronFox as an alternative.

Frequently Asked Questions – LibreWolf
https://librewolf.net/docs/faq/#will-you-provide-an-android-version-of-librewolf

Thank you for cross-posting!

I found just one Japanese instance. It is unfortunate that Lemmy is not well-known in Japan.

https://lm.korako.me/