Feature-rich; lots of options to customize your workflow. Really excellent extension.

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This helps browsing a lot, but it does have a few bugs. Right now, I'm experiencing a bug where the tabs have been slightly truncated, chopping off the favicons.

Very outstanding addon, but since 2 months it's super slow. When disabled Firefox is working fine. But enabled it slows so much down that Firefox is nearly unuseable.

This add-on has changed the way I browse the Internet! It makes managing multiple tabs so easy!