reload_chrome_browser_tab_on_mac.sh

#!/bin/sh

# Don't forget to run "sudo chmod a+x filename" to give this script neccessary permissions in order to work properly.

osascript <<EOD
  tell application "Google Chrome"
  	set windowList to every window
  	repeat with aWindow in windowList
  		set tabList to every tab of aWindow
  		repeat with atab in tabList
  			if (URL of atab contains "localhost") then
  				tell atab to reload
  			end if
  		end repeat
  	end repeat
  end tell
EOD

reload_safari_browser_tab.sh

#!/bin/sh

osascript <<EOD
  tell application "Safari"
    set windowList to every window
    repeat with aWindow in windowList
      set tabList to every tab of aWindow
      repeat with atab in tabList
        if (URL of atab contains "localhost") then
          tell atab to do javascript "window.location.reload()"
        end if
      end repeat
    end repeat
  end tell
EOD