Tab previews are in the works for a future release of Mozilla Firefox. In current versions of Firefox you hover your mouse over a non-active tab (i.e. any
Tooltips show the full title of the tab, which is useful if the title is long, the tabs are small because there are a lot of them, or it’s a pinned tab
Tooltips show the full title of the tab, which is useful if the title is long, the tabs are small because there are a lot of them, or it’s a pinned tab