/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tabs_fill_available_width.css made available under Mozilla Public License v. 2.0 See the above repository for updates as well as full license text. */ /* Apply this customization only on smaller screens */ @media (max-width: 700px) { /* Why 100vw? Tab closing requires width animation to end and "none" can't be animated */ .tabbrowser-tab[fadein]:not([style^="max-width"]) { max-width: 100vw !important; } }