Index: gc_lang/fr/webext/content_scripts/menu.css
==================================================================
--- gc_lang/fr/webext/content_scripts/menu.css
+++ gc_lang/fr/webext/content_scripts/menu.css
@@ -18,11 +18,11 @@
     border-radius: 50%;
     text-align: center;
     cursor: pointer;
     box-shadow: 0 0 0 0 hsla(210, 50%, 50%, .5);
     z-index: 2147483640; /* maximum is 2147483647: https://stackoverflow.com/questions/491052/minimum-and-maximum-value-of-z-index */
-    animation: grammalecte-spin 2s ease 3;
+    animation: grammalecte-spin 2s ease 1;
 }
 .grammalecte_menu_main_button:hover {
     border: 4px solid hsla(210, 80%, 35%, .5);
     background-color: hsla(210, 80%, 55%, .5);
     animation: grammalecte-spin .5s linear infinite;