[kiwijamo]

That becomes a problem when you work across both ecosystems. I use devices in both ecosystems so an independent password sync utility is necessary for me to be able to access the same set of passwords on my macOS, Linux, Windows and Android devices and within Firefox (on all 4 underlying platforms). I personally use Bitwarden which seems to have good performance in Firefox at least. The Android Bitwarden app also supports password auto-fill in native apps on Android as well (and it works on iOS as well when I had an iOS device).

[askvictor]

I think for that use case, you have to suffer the performance penalty of a third-party password manager (original post was looking for the fastest password manager, which will almost always be the first-party one, and be tied to the one platform).