Please add a decent way to extract the private key I am using GPG for all my eMail accounts with my email client, and instead of this crude IMAP-Proxy I would prefer to just import my Protonmail PrivateKey locally and use it like any other GPG mail.

Not having my private key is a large problem. We should have the right to use them outside of Protonmail and even revoke them!

Please add this feature!

The lack of this feature is a game-breaker. Please add this feature!
As far as I know https://www.npmjs.com/package/protonmail-export works only with 2 password mode.

https://www.npmjs.com/package/protonmail-export shows a way to retrieve your private key from the browser. Not easy but feasable. Protonmail should give the user a better and more simplistic way.

As said before one absolutly needs to be in possession of one's private key. Otherwise PGP's security will be compromised if one of the underlying security measures (https) breaks. Given all the concerns regarding browser security, script security, ... , it just makes me uneasy to know that my private key lives in my browser and I can't access it.

Having no private key means: I can NOT revoke this key, I can NOT sign, I can NOT be part of a WOT. I can NOT change my passphrase. Having no access to my private key runs against all intentions of PGP/GPG.

The lack of export is a serious issue. I feel uncomfortable registering my public key in the many public key servers unless I hold the private key. Once the public key is registered in the public key server pools, users may send encrypted communications/attachments outside of protonmail, requiring me to have access to the private key to decrypt the content.

I think a feature like this must exist, so any user can deside for themselves if they want to make use of it. Yes, there's a chance that an exported key gets compromised. But the upside of having a private copy is that if protonmail for whatever reason loses my key, I have the ability to have it restored by offering my copy in return.

I've read that there are plans to offer an export feature for e-mail as well. I imagine that depending on whether they are exported as plaintext or encrypted, the necessity of this feature might also be of relevance.

A key export/import function may be very helpful!

This feature would be great to have, but many users will have no clue what the difference is between public and private keys. Obviously, there should be a HUGE, SCARY WARNING MESSAGE to the user to not export/save the private key unless they know what they're doing, or else jeopardize the privacy of their email. eg. "Are you sure you didn't mean to export your public key instead?"