Fixed compatibility issues with Google services - the extension now clearly indicates unsupported sites in the tab list.

- scroll synchronization is much smoother than before.

- Improved search functionality to also searching based on the URL of a tab.
- Improved the user experience by ensuring that the focus remains on the input element when selecting tab items with the mouse so that the search flow is not interrupted.

- Fixed the wording of hotkeys in Window OS.

- Fixed an error that prevented the Firefox browser from getting tab object.

Simply change the version to 2.0.4 -> 2.1.0.