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Agents, Actions and Automation
24

Would that approach hold true for Firefox too? If so that would cover the three main (Mac) web browsers.

25

Out of reach, alas. Firefox doesn’t provide an osascript interface.

(THO ⌘L ⌘C can be emulated with the System Events (keystroke … using command down) technique – macos - MacOSX or AppleScript: get current URL from Firefox - Stack Overflow )

And I notice that Hook.app are using a more elaborate version of a gui-scripting ⌘L, Edit > Copy approach, which suggests that they may have found intermittent misses with the simple System Events key down events in FireFox:

--(c) CogSci (Hook.app)
use framework "AppKit"

-- classes, constants, and enums used
property NSShiftKeyMask : a reference to 131072
property NSAlternateKeyMask : a reference to 524288
property NSControlKeyMask : a reference to 262144
property NSEvent : a reference to current application's NSEvent

set modifier_down to true
repeat while modifier_down
    set modifier_flags to NSEvent's modifierFlags()
    set option_down to ((modifier_flags div (get NSAlternateKeyMask)) mod 2) = 1
    set shift_down to ((modifier_flags div (get NSShiftKeyMask)) mod 2) = 1
    set control_down to ((modifier_flags div (get NSControlKeyMask)) mod 2) = 1
    set modifier_down to option_down or shift_down or control_down
end repeat

tell application "Firefox"
    activate
    delay 0.05
end tell
tell application "System Events"
    keystroke "l" using {command down}
    keystroke (key code 53)
    keystroke (key code 53)
    --keystroke "c" using {command down}
    tell process "Firefox"
        click menu item "Copy" of menu "Edit" of menu bar 1
    end tell
    delay 0.05
    set theClipboard to current application's NSPasteboard's generalPasteboard's stringForType:(current application's NSPasteboardTypeString)
    return the theClipboard as string
end tell
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