Users enjoy Opera's sleek look and fast web browsing experience, but adding plugins takes Opera to new levels of efficiency and productivity. Here's a look at some essential Opera plugins to consider.

LastPass is a password manager that creates a single primary password so you can log in to your favorite sites with a single click. With autofill, LastPass remembers your usernames, passwords, and other information across multiple accounts.

This Opera plugin includes a Stealth Mode feature that lets you quickly scan Facebook to stay up to date with the latest updates. Like buttons and comment areas are hidden. Without the ability to like, comment, or interact, you can quickly absorb the content you want, making scrolling through the news feed faster.

If you want to know if and when your emails have been read, or schedule a specific email for a later date, try Boomerang for Gmail. Boomerang offers integrated email scheduling, reminders, and read notifications.