Firefox 50 - Tab Cycling
I prefer the
tab keyboard shortcut to cycle through the most recently used tabs in order of history, rather than to just cycle right/left through the list like chrome does. This makes the browser act more like most other applications such as Sublime, Notepad++, and Netbeans.
In the past, I had to use the Opera browser, or install a Firefox plugin (which has since disappeared). Now the functionality is built into Firefox and all you have to do is go to
preferences, and click the check-box as shown below: