Looks like no. Here is the one reference to `toolkit.tabbox.switchByScrolling`: https://searchfox.org/mozilla-central/source/toolkit/content/widgets/tabbox.js#

Looks like no. Here is the one reference to `toolkit.tabbox.switchByScrolling`: https://searchfox.org/mozilla-central/source/toolkit/content/widgets/tabbox.js#450 https://searchfox.org/mozilla-central/source/toolkit/content... You can see here that the second param to advanceSelectedTab is false This param controls wrapping according to the definition: https://searchfox.org/mozilla-central/source/toolkit/content/widgets/tabbox.js#757 https://searchfox.org/mozilla-central/source/toolkit/content... To confirm, we can see that the shift+tab/shift+ctrl+tab (which wraps) definition passes that param as true: https://searchfox.org/mozilla-central/source/toolkit/content/widgets/tabbox.js#137 https://searchfox.org/mozilla-central/source/toolkit/content... Maybe you can file a bug to add another bool pref instead of hardcoding false?