Firefox Tip: Flip Between Two Tabs with FLST

A hardcore Firefox user, I usually keep upwards of a dozen tabs open at any given time. The problem is, I frequently need to jump back and forth between the same two tabs, which is difficult when they're not adjacent. Sure, I could drag one of them next to the other, but that's not my idea of a practical solution.

Thankfully, there's a Firefox extension that makes it a snap to jump between my two most recently viewed tabs: FLST. Short for Focus Last Selected Tab, this add-on is designed to bring the previously viewed tab into focus when you close the current tab. But it also lets you press Ctrl-period to cycle between the two most recent tabs.

This saves me having to reach for my mouse, which in turn saves me considerable time. I'm adding this to my list of Best Firefox Extensions Ever, right alongside Auto Copy and PermaTabs.