For Lastpass, I use a Rofi-based frontend on Linux.

A keybinding pops up a search box, I search for the entry I want and paste it into Qutebrowser.

I like that it works outside the browser-- so I can unlock it once and works across all browsers.

Also, I disable autofill anyway. Lastpass has had multiple security issues with their autofill feature in the past and I don't trust it.

FWIW I use something similar for KeePassXC: https://github.com/firecat53/keepmenu

I don't know, but FYI it seems someone wrote a script for 1Password: https://github.com/qutebrowser/qutebrowser/tree/master/misc/...

It works well with pass.

Did you do anything to integrate it or just solve pass outside of qb?

You can use the userscripts : https://github.com/qutebrowser/qutebrowser/tree/master/misc/...

For example for pass:

config.bind('some key', 'spawn --userscript qute-pass')