In the latest version of Firefox, when I hit CTRL+TAB for switching between tabs on a Windows machine, a small preview windows is being displayed, showing thumbnails of the tabs. Only after releasing the CTRL key, Firefox finally switches to the second tab.
This is quite cumbersome for when I just want to reference some text from another tab. I have to CTRL+TAB, release the CTRL key, CTRL-TAB again and release the CTRL key again.
How can I disable this new feature and return to the ole behaviour, immediately showing the next tab when hitting CTRL+TAB?