Firefox on macOS - Tabs broken, now fixed

Using Firefox 64.0.2 on a new MacBook Pro, I was annoyed to find that the tab switching behaviour - I use [Ctrl][TAB] to switch between browser tabs - wasn't working as it had on my old Mac.

Instead, I was seeing a preview of each tab, which really really slows down my workflow.

Thankfully, it's fixable via the about:config tweak: -

browser.ctrlTab.recentlyUsedOrder;true

to: -

browser.ctrlTab.recentlyUsedOrder;false

Apparently it's a "feature" in the latest versions of Firefox: -

https://support.mozilla.org/en-US/questions/1232460

Thankfully there's always a better way .....