This AppleScript saves all the tabs open in all Safari windows to a Markdown file.

urlsafari

(*
Export All Safari Tabs in All Open Windows to a Markdown File
July 13, 2015

// SCRIPT PAGE
	http://hegde.me/urlsafari
   
// ORIGINAL SCRIPT ON WHICH THIS SCRIPT IS BUILT
	http://veritrope.com/code/export-all-safari-tabs-to-a-text-file

// CHANGES COMPARED TO THE ORIGINAL SCRIPT
	1. Save URLs to .md instead of .txt
	2. Save URLs from all windows instead of just the first window
	3. Save the file to Downloads/ instead of Desktop/
	
// DISCLAIMER
	I have made some minor changes to the orginal script which can be found at veritrope.com (full link given above). I'm not affiliated with veritrope.com.

// TERMS OF USE:
	This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. 

	To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
*)
----------------------------------------------------------------------------------------
-- NAME OF REPORT TITLE
property report_Title : "URL List from Safari"

-- PREPARE THE LIST
set url_list to {}
set the date_stamp to ((the current date) as string)
set NoteTitle to "# " & the date_stamp

-- GET TABS FROM SAFARI
set window_count to 1
tell application "Safari"
	activate
	set safariWindow to windows
	repeat with w in safariWindow
		try
			if (tabs of w) is not {} then
				copy ("## Window " & window_count & ":" & return) to the end of url_list
			end if
			repeat with t in (tabs of w)
				set TabTitle to ("1. [" & name of t & "]")
				set TabURL to ("(" & URL of t & ")")
				set TabInfo to (TabTitle & TabURL & return)
				copy TabInfo to the end of url_list
			end repeat
		end try
		set window_count to window_count + 1
	end repeat
end tell

-- CONVERT URL_LIST TO TEXT
set old_delim to AppleScript's text item delimiters
set AppleScript's text item delimiters to return
set url_list to (NoteTitle & return & return & return & url_list) as text
set AppleScript's text item delimiters to old_delim

-- CHOOSE FILE NAME FOR EXPORT 
tell application "Finder"
	activate
	set save_File to choose file name with prompt "Name this file:" default name report_Title default location (path to downloads folder)
end tell

--WRITE THE FILE
tell application "System Events"
	set save_File to open for access (save_File & ".md" as string) with write permission
	try
		write url_list to save_File
	end try
	close access save_File
end tell