Preserve URL when visiting IPFS or ENS pages

[danfinlay]

Chromium has introduced the new protocol prefix handlers

This is an API that allows a webextension to handle protocols with dweb prefixes like ipfs, ethereum, ssb, and more!

You can learn to use them here.

[Gudahtt]

Related: #7740

As discussed in this comment, we may be able to do this with the proxy permission as well (that was how the other IPFS extension we analyzed implemented it IIRC).

[gerbz]

@danfinlay If you don't want to keep track of which browsers support which protocols (ipfs://, ipns://, ens://, etc.), there's an interim solution using INPS and the same public gateway already supported by MetaMask.

MM current behavior redirects like this:
vitalik.eth -> https://bafybeibc7nsbhktzjvplpi4qmzk7kd22yqol3v4thpbhp5yzfspcc56hsi.ipfs.dweb.link/

However this also works while preserving the ENS domain somewhat:
vitalik.eth -> https://vitalik-eth.ipns.dweb.link

Brave browser handles it this way already for ipns://vitalik.eth when IPFS is set to use a public gateway.