Web Extensions
Memory Monitor
Displays RAM usage information.
Processor Monitor
Displays CPU usage information.
Bookmark Topper
Moves newly created bookmarks to the top of their folder.
Navigation Confirmation
Asks for confirmation before closing, reloading, or navigating to another page.
Link Controller
Controls whether links open in the current tab or in a new tab.
Single Tab Zoom
Applies zooming to the current tab instead of the entire site.
Reddit
Google Groups