To demonstrate on Safari - I don't have Firefox.You can google for more suggestions - some may work better for your needs. You can also do this running Firefox from a command line or Icon with properties set to this: firefox.exe -width 1680 -height 1050 This would assume everyones monitor is the same size. Firefox should open in the last closed state.Good for: readability and security and simplicity
First off, let’s look at Safari, the built-in web browser on your Mac. It actually slows down on its performance and worst – it gets frozen. Mozilla Firefox Slows Down and Freezes This is one of the most common issues that Mac users experience when they are using Mozilla Firefox on their Mac.