But I cannot access this folder on Android? Otherwise I had used Syncthing.

I use filen actively

But, how to use it as an Alternative to firefox sync??

Hmm,
Will self hosting sync solve the problem??

Btw this metadat collection will happen anyway if you use addons (though not linked to your account)?

So I should use ffsync for now i guess. Is there any info regarding what unencrypted metadata they can link to me i use ff account?

Can I self host it from termux for localhost only?? Without need of domain and other resources??

Is not ffsync encrypted?? I guess the downside is

1. Unencrypted metadata
2. Projected future

But i heard Sync feature encrypts data on client side And it is end to end encrypt