Capyloon is an alternative trying to carry the FxOS torch, but its focus on IPFS & things other than telephony make it hard to recommend if you can’t use a phone as a phone.
I'm still very bullish on the dWeb pieces: content based addressing, UCANs (https://ucan.xyz/) for distributed auth, new web app models (https://hackmd.io/@robin-berjon/tiles) to create an ecosystem that is not locked by centralized app stores.
There's a lot to do, all contributions are welcome (frontend, device ports, platform apis...). We have a Matrix channel (https://matrix.to/#/#capyloon:matrix.org) and you can try desktop builds easily following the steps at https://github.com/capyloon/nutria#quick-start