Firefox Nightly: Mozilla makes it easier to test vertical tabs The latest Firefox Nightly release makes it easier to test vertical tabs and the browser's new sidebar. Mozilla launched support for the, much requested, vertical tabs feature in Firefox in June. Back […] Thank you for being a Ghacks reader. The post https://www.ghacks.net/2024/08/09/firefox-nightly-mozilla-makes-it-easier-to-test-vertical-tabs/ . https://www.ghacks.net/2024/08/09/firefox-nightly-mozilla-makes-it-easier-to-test-vertical-tabs/