> I don't think there exist a password manager that is explicitly designed for a compromised/hostile device.
The crypto people tried this with hardware only password managers but they were too annoying. I have a halfway solution of using pass with Yubikey/GPG where each password decryption requires a touch. It does protect against the entire vault being decrypted at once and exfiltrated.
> tried this with hardware only password managers but they were too annoying
And besides that, ultimately if the computer you're using been compromised, whatever you do on that computer can be mucked about with, so while the password sits safely on the hardware, once you're logged in in the browser, the cookie is just sitting there. I guess you'd get furthest isolation with Qubes et al, but with a regular Linux installation you'd still be exposed with a hardware password manager, if the installation been compromised.