Browser Sync is nice but sometimes it is not available or it’s just plain overkill.
I wanted to always be able to refresh my web browser window with a keystroke while still keeping my code editor open and focused.
I use the 64-bit version of Firefox Developer Edition for Windows.
The simple AutoHotkey snippet below will refresh the current Firefox Developer Edition edition tab when the F5 key is pressed within Sublime Text, while still keeping the focus on Sublime Text.