Hide 'Firefox View' in css, as it can't be hidden in about:config on Firefox 123 (MR 43)

src/userChrome/tabmenu.css

@@ -16,10 +16,17 @@
         display: block;
     }
 
+    /* Hide firefox-view tab, as none of the options in about:config hides it on FF 123 */
+    #firefox-view-button {
+        display: none;
+    }
+
     /* Increase tab width, to have more space for displaying the title of the
-     * website and to make the "all tabs" button show up. */
+     * website and to make the "all tabs" button show up.
+     * Hide the would be divider to the Firefox View button */
     #tabbrowser-tabs {
         --tab-min-width: calc(100vw - 116px) !important;
+        border-inline-start: 0 !important;
     }
 
     /* Rotate the arrow on the "all tabs" button to point upwards, since the