View the changelog here https://github.com/blenderskool/untab/releases/tag/v0.4.0

Major additions
* Introducing Plugin UI system that would allow plugins to be even more powerful in the future 🧪
* Add buttons to pin/unpin and close open tabs.

Updates
* Add results count to each category.
* Add plugin UI components and alias to it.
* Add audio indicator to the tabs.
* Update support link.
* Add Bing search Plugin.

Fixes
* Iframe background color on dark scheme websites, eg. github.com.
* Fix hitting arrow right resets selected item.
* Fix UnTab interface not showing up in pages where the content script cannot be embedded.