Tabsolutely

If you're tired of using a variety of tools to enhance your browsing experience - Tabsolutely is for you. This free, private extension combines many daily tab tools into one unified delightful UI.

Sort Tabs - sort all your tabs alphabetically (by title or domain)
Copy Tabs - copy all the tabs in the active window or all windows
Paste Tabs - paste a list of tabs into your browser window
Merge Tabs - merge tabs from many windows into the active window
Stash Tabs - save your open tabs for later in a convenient list
Tab Audio - adjust the tab volume, equalizer and compressor
Screenshot - capture a region or the whole page, with built in editor
Media Capture - save images and video* from the active tab
Auto Scroll - automatically scroll in any direction at variable speed
Popout - pop the tab out into a minimal window (great for videos)

Tabsolutely also is highly customizable, featuring theming and re-ordering features and more to make it truly your own.

Suggestions welcome.

*exceptions apply for video.