I'm the opposite of someone who keeps tons of tabs open, I'm constantly closing and reopening the browser through out the day. One of main reasons why I started using Chrome in the first place all of those years ago was the start up speed. I know Firefox is much better today at this in the past but any improvement would help me switch full time to FireFox.
I turn my computer off frequently and FF launches instantly when I open it. Just as fast as any other program (and I'm a tab hoarder).
Though the number one reason I have FF instead of Chrome is that FF Mobile allows ad blocking. So I can have ad blocking across my browsers, send tabs, and keep consistent plugins. The anti-tracking and privacy features are also a great plus.
That is precisely the reason I switched back to Firefox after all those Chrome years.
The Firefox startup is pretty much instant. Chrome starts fast as well, but there is a moment, when it's just a blank window that I can't do anything with.
Firefox opens instantly to a usable window with the cursor blinking on the address bar.
