I didn't know we can switch tabs by typing '%' in the address bar. Helpful indeed.
Re:How Firefox Got Fast Again
by Manishearth on Monday November 13, 2017 @02:35PM
(#15689438)
You can also just type something matching the tab name or URL and "switch to tab" will be in the results in the address bar, usually at the top. It's very nice especially for when you have lots of tabs and you want to do "Open the page matching this from my history unless that tab is already open, in which case switch to tab" because you can just type into the address bar and press enter and it will work.
Some of these things can be done in other browsers using third party extensions, but I am extremely reluctant when it comes to third party extensions for security reasons.
[Edit] Very important to me as well is built-in reader view.