Workona - A better way to work in the browser.
Auto Tab Discard - Auto Tab Discard a lightweight extension that uses the native method (tabs.
Tab Manager Plus for Chrome - The only tab manager you'll ever need
Firemin - Firemin will force Firefox to use less memory. It is safe to use, spyware free and completely free.
Toby - Better Than Bookmarks
BrightExplorer - Add a tabbed interface to Windows Explorer.