After days and nights working on the extension, I finally finished the v1 of the browser extension. This feature has been asked by a lot of users who find going to the webapp to create an alias is just cumbersome and I must agree with them ...
The V1 is far from pretty and the UX can still improve a lot but at some point I need to decide where the v1 should stop.
If you guys are interested, the Firefox extension is on https://addons.mozilla.org/en-GB/firefox/addon/simplelogin/ and the Chrome one is https://chrome.google.com/webstore/detail/simplelogin-extension/dphilobhebphkdjbpfohgikllaljmgbn
The extension code is public btw at https://github.com/simple-login/browser-extension. If someone is interested in making a quick Chrome/Firefox extension, ping me, I could maybe give a hand as this is still fresh :).
Our next step is to make the Safari extension (my default browser). Stay tuned!