diff --git a/chrome/tabs_fill_available_width.css b/chrome/tabs_fill_available_width.css
index b8890dc..f7a3094 100644
--- a/chrome/tabs_fill_available_width.css
+++ b/chrome/tabs_fill_available_width.css
@@ -2,4 +2,4 @@
 See the above repository for updates as well as full license text. */
 
 /* Why 100vw? Tab closing requires width animation to end and "none" can't be animated */
-.tabbrowser-tab[fadein]{ max-width: 100vw !important }
\ No newline at end of file
+.tabbrowser-tab[fadein]:not([style^="max-width"]){ max-width: 100vw !important }
\ No newline at end of file