Tabs Controls Shortcuts wót Akhil Gupta

This is extension provides keyboard shortcuts for following actions:
- Moving Tab(s) Left/Right
- Moving Tab(s) to the Start/End
- Pinning/Unpinning Tab(s)
- Duplicating Tab(s)

To change the default keyboard shortcuts, or disable any of them
- Go to about:addons
- Select Manage Extension Shortcuts