The add-on works flawlessly and is the most customizable and feature-packed one I've seen so far. Unlike other similar add-ons, this one also supports Firefox's multi-select feature, customizable hotkeys, and tab wrapping, all of which are optional!

If there's one thing I'd wish this add-on have, it would be the ability to hotkeys of your choice, whether default or secondary.

Works super fast and if you set the browser.tabs.multiselect flag on it even lets you manipulate multiple tabs simultaneously.

Working well, though I would say Alt+Shift+1 for start of tab bar would be conventional - thank you!