There is very little that the old Tile Tabs could do, that Tile Tabs WE cannot do. The main difference is that the old Tile Tabs tiled tabs in the same window, whereas Tile Tabs WE tiles tabs in separate windows. Features such as opening links in a different tab, synchronized scrolling of tabs, and resizing adjacent tabs are still available in Tile Tabs WE.

The new WebExtensions API's introduced with Firefox 57 must now be used by all add-ons and do not support displaying multiple tabs in the same browser window.