It certainly does what it should, but the UI for filling passwords is hideous.

Currently the “fill” button occupies approximately 5% of the card. The “copy” button occupies less than that. Both of those activities are performed far more frequently than “view,” and yet the majority of the card is dedicated to “view.”

Also? This is the reverse of the way the application works in other browsers, so if you use Chrome and have it done properly, you'll be continually miserable with FireFox.

This plugin needs to create a “view” button to replace the “Fill” button and make the majority of the card “fill” the credentials.