I'd suggest MuPDF or MuPDF mini which are both available on Fdroid.

It works fine in Linux here. I found Chromium works better than Firefox with Mozilla Hubs. If you're having trouble, then try the troubleshooting section in this wiki page we created for HOPE 2020, which helped tons of conference attendees:

https://wiki.hope.net/index.php?title=Anarchist_Hackers_Village

The most well known is Monero, which is a CryptoNote protocol coin, while Hush is a Zcash-forked coin, so their approach to privacy is different. Keep in mind that both Hush and Monero enforce mandatory privacy and even though Zcash has privacy technology, they never encourage their userbase to use it, so they don't use it.

Hush is creating a privacy messenger over a privacy-focused cryptocurrency. There are some other CryptoNote coins doing the same thing, such as Conceal (CCX) and LOKI chat systems (Session). For more info about some of the differences between these coins, check out this link .

LOL!

Thank you for this post :)