Mac: reloading document in Chrome or Firefox?

Question

How can I tell Chrome or Firefox to reload the document in the top window? Here's what I'm using for Safari:

osascript -e '
    tell application "Safari"
      activate
      do JavaScript "history.go(0)" in document 1
    end tell
'

Answer 1

Here's the code for Chrome:

tell application "Google Chrome"
    tell the active tab of its first window
        reload
    end tell
end tell

Or more concisely:

tell application "Google Chrome" to tell the active tab of its first window
    reload
end tell

Answer 2

I do not think Firefox or Chrome have special Applescript support, but you can send the keystrokes (Cmd-R) to refresh the page:

tell application "Firefox"
    activate
    tell application "System Events" to keystroke "r" using command down
end tell