Thanks. I use multiple ways to change tabs. CMD+<number> (most often used), CMD+OPT+<left|right arrow>, mouse, or trackpad; depends where my hands are at the time.

ctrl+tab actually feels a bit awkward on my MBP and only shows 5 tabs on FF Nightly; seems to be sourced from the most recently used ¯\_(ツ)_/¯

I'd be a happy camper if there was a sane add-on for FF that let me quickly navigate links on a page. With sites being as interactive as they are, "tab" just doesn't cut it (not more efficiently than the mouse, anyway).