As I updated the version to 1.4.0 , adding the ‘import’ feature I am sharing this here.
I made this extension because I couldn’t find one that wouldn’t ask for too much permissions (such as accessing all websites data).
Eventually I found it nice to have a TOTP that can really be audited, the code is 649 lines of JS, 214 CSS and 52 HTML. Feel free to fork, copy part of it, contribute or just request fix/features.
I have used it for more than a year every day and it works nicely.
There is indeed a whole lot of problems with security and we don’t have consensus on a nice/minimum setup. My main concern right now is the physical access to hardware (my place is far from being a vault). Finding my address would not be that big of an issue then getting in would be very easy.
For now having backups in multiple places is the best for me, having physical keys is not solving any on my security concern. The good part is no one cares about my stuff so for now this is OK.