DO NOT install via Mozilla Rated 3 out of 5 stars

Been using premium for about 2y now. It largely stays out of the way, has good hotkey support, integrates with Dolphin on Android, and provides a good standalone app. No issues with sync between multiple browsers and platforms.This plugin has been getting progressively slower, and held my browser hostage for 20-30 seconds during login (FF v23, OSX 10.8.4). Though it doesn't say so here, the solution is to uninstall the plugin, then reinstall via http://lastpass.com/dl Free for desktop, subscription required for mobile sync. For that reason, I really expect better from their support. Others feel the same: http://bit.ly/19wu9yx

This review is for a previous version of the add-on (2.0.20.1-signed).