1) Integration with Firefox for Android is not existant, and the usage of the Autofill ad Accessibility features of Android does a poor job. Slow, not always recognizing the right field (I had multiple times the passoword copied in the user field), bad management of the overlay of the Last Pass boxes. A complete disaster.

2) Desktop interface, while really polished is slugghish and bugged: loading of the boxes (Autofill and Generate Password) takes several seconds (if they load at all!), multiple occasions where Last Pass did not recognized the "update passoword" fields and I had to manually change it in the vault.

Conclusion: I switched to Bitwarden.