Try this: tell application "Firefox" activate set pb to the clipboard tell application "System Events"

Try this: tell application "Firefox" activate set pb to the clipboard tell application "System Events" keystroke "l" using command down keystroke "c" using command down end tell set page_url to the clipboard set the clipboard to pb end tell It’s kind of hacked together and I haven’t tested it with rigor but until now it did its job. If you use it, please let me know if you could enhance it or whether it breaks for certain pasteboard contents.