diff --git a/nullboard.html b/nullboard.html
index 0717e11..c84937b 100644
--- a/nullboard.html
+++ b/nullboard.html
@@ -1216,11 +1216,66 @@
 	var nb_codeVersion = 20200429;
 	var nb_dataVersion = 20190412;
 
-	//
-	if (typeof(localStorage) === "undefined")
-	{
-		alert('Hmmm... no "localStorage" support');
-	}
+   class Database {
+      get(key) {
+         throw "abstract";
+      }
+
+      set(key)
+      {
+         throw "abstract";
+      }
+
+      del(key)
+      {
+         throw "abstract";
+      }
+
+      forEach(foo)
+      {
+         throw "abstract";
+      }
+   }
+
+   class Local extends Database {
+      constructor()
+      {
+         super();
+	      if (typeof(localStorage) === "undefined")
+	      {
+	      	throw 'Hmmm... no "localStorage" support';
+	      }
+      }
+
+      get(key) {
+         return localStorage.getItem(key);
+      }
+
+      set(key, value)
+      {
+         return localStorage.setItem(key, value);
+      }
+
+      del(key)
+      {
+         return localStorage.removeItem(key);
+      }
+
+      forEach(foo)
+      {
+         var keys = [];
+		   for (var i=0; i<localStorage.length; i++)
+		   {
+            keys.push(localStorage.key(i));
+		   }
+         for (var i=0; i<keys.length; i++)
+         {
+            foo(keys[i]);
+         }
+      }
+   }
+
+   globalStorage = new Local();
 
 	/*
 	 *	poor man's error handling -- $fixme
@@ -1421,8 +1476,8 @@
 
 		var blob_id = board.id + '.' + board.revision;
 
-		localStorage.setItem('nullboard.board.' + blob_id, JSON.stringify(board));
-		localStorage.setItem('nullboard.board.' + board.id, board.revision);
+		globalStorage.set('nullboard.board.' + blob_id, JSON.stringify(board));
+		globalStorage.set('nullboard.board.' + board.id, board.revision);
 		console.log('Saved nullboard.board.' + blob_id + ' of ' + board.title);
 
 		//
@@ -1473,11 +1528,11 @@
 		var blob;
 		var board;
 
-		revision = localStorage.getItem('nullboard.board.' + board_id);
+		revision = globalStorage.get('nullboard.board.' + board_id);
 		if (! revision)
 			return false;
 
-		blob = localStorage.getItem('nullboard.board.' + board_id + '.' + revision);
+		blob = globalStorage.get('nullboard.board.' + board_id + '.' + revision);
 		if (! blob)
 			return false;
 
@@ -1507,11 +1562,13 @@
 		var re = new RegExp('^nullboard\.board\.' + board_id + '\.(\\d+)$');
 		var r = [];
 
-		for (var i=0; i<localStorage.length; i++)
-		{
-			var m = localStorage.key(i).match(re);
-			if (m) r.push( parseInt(m[1]) );
-		}
+      globalStorage.forEach((k) => {
+			var m = k.match(re);
+         if (m)
+         {
+			   r.push( parseInt(m[1]) );
+         }
+      });
 
 		r.sort(function(a,b){ return b-a; });
 		return r;
@@ -1541,7 +1598,7 @@
 	function nukeBoardRevision(rev)
 	{
 		var k = 'nullboard.board.' + document.board.id + '.' + rev;
-		localStorage.removeItem(k);
+		globalStorage.del(k);
 		console.log("Removed " + k);
 	}
 
@@ -1549,21 +1606,15 @@
 	{
 		var prefix = new RegExp('^nullboard\.board\.' + document.board.id);
 
-		for (var i=0; i<localStorage.length; )
-		{
-			var k = localStorage.key(i);
+      globalStorage.forEach((k) => {
 			if (k.match(prefix))
 			{
 				console.log("Removed " + k);
-				localStorage.removeItem(k);
+				globalStorage.del(k);
 			}
-			else
-			{
-				i++;
-			}
-		}
+      });
 
-		localStorage.removeItem('nullboard.last_board');
+		globalStorage.del('nullboard.last_board');
 	}
 
 	//
@@ -1582,8 +1633,8 @@
 		board.id = +new Date();
 		var blob_id = board.id + '.' + board.revision;
 
-		localStorage.setItem('nullboard.board.' + blob_id, JSON.stringify(board));
-		localStorage.setItem('nullboard.board.' + board.id, board.revision);
+		globalStorage.set('nullboard.board.' + blob_id, JSON.stringify(board));
+		globalStorage.set('nullboard.board.' + board.id, board.revision);
 
 		openBoard(board.id);
 	}
@@ -1619,7 +1670,7 @@
 			'in":false},{"text":"Boards","raw":true,"min":false},{"text":"\u2022   Check out   \u2261   at the top right.",' +
 			'"raw":false,"min":false},{"text":"\u2022   Try adding a new board.\\n\u2022   Try switching between the boards' +
 			'.","raw":false,"min":false},{"text":"\u2022   Try deleting a board. Unlike deleting a\\n     list this  _canno' +
-			't_  be undone.","raw":false,"min":false},{"text":"\u2022   Export the board   (save to a file, as json)\\n' + 
+			't_  be undone.","raw":false,"min":false},{"text":"\u2022   Export the board   (save to a file, as json)\\n' +
 			'\u2022   Import the board   (load from a save)","raw":false,"min":false}]}]}';
 
 		var demo = parseBoard(blob);
@@ -1631,9 +1682,9 @@
 		demo.revision = 1;
 		demo.history = [ 1 ];
 
-		localStorage.setItem('nullboard.board.' + demo.id + '.' + demo.revision, JSON.stringify(demo));
-		localStorage.setItem('nullboard.board.' + demo.id, demo.revision);
-		localStorage.setItem('nullboard.last_board', demo.id);
+		globalStorage.set('nullboard.board.' + demo.id + '.' + demo.revision, JSON.stringify(demo));
+		globalStorage.set('nullboard.board.' + demo.id, demo.revision);
+		globalStorage.set('nullboard.last_board', demo.id);
 
 		return demo.id;
 	}
@@ -1818,7 +1869,7 @@
 
 		document.board = loadBoard(board_id);
 
-		localStorage.setItem('nullboard.last_board', board_id);
+		globalStorage.set('nullboard.last_board', board_id);
 
 		showBoard(true);
 	}
@@ -1829,7 +1880,7 @@
 
 		var via_menu = $('.wrap .board > .head .menu .bulk').is(':visible');
 
-		localStorage.setItem('nullboard.board.' + board_id, revision);
+		globalStorage.set('nullboard.board.' + board_id, revision);
 		openBoard(board_id);
 
 		if (via_menu)
@@ -1855,7 +1906,7 @@
 			 .queue(function(){ $board.remove(); });
 
 		document.board = null;
-		localStorage.setItem('nullboard.last_board', null);
+		globalStorage.set('nullboard.last_board', null);
 
 		updateUndoRedo();
 		updateBoardIndex();
@@ -1867,7 +1918,7 @@
 		document.board = new Board('');
 		document.board.history = [ 0 ];
 
-		localStorage.setItem('nullboard.last_board', document.board_id);
+		globalStorage.set('nullboard.last_board', document.board_id);
 
 		showBoard(false);
 
@@ -2210,11 +2261,11 @@
 	 */
 	function peekBoardTitle(board_id)
 	{
-		var revision = localStorage.getItem('nullboard.board.' + board_id);
+		var revision = globalStorage.get('nullboard.board.' + board_id);
 		if (! revision)
 			return false;
 
-		var blob = localStorage.getItem('nullboard.board.' + board_id + '.' + revision);
+		var blob = globalStorage.get('nullboard.board.' + board_id + '.' + revision);
 		if (! blob)
 			return false;
 
@@ -2239,17 +2290,15 @@
 		$index.html('');
 		$index.hide();
 
-		for (var i=0; i<localStorage.length; i++)
-		{
-			var k = localStorage.key(i);
+      globalStorage.forEach((k) => {
 			var m = k.match(/^nullboard\.board\.(\d+)$/);
 			if (! m)
-				continue;
+				return;
 
 			var board_id = m[1];
 			var title = peekBoardTitle(board_id);
 			if (title === false)
-				continue;
+				return;
 
 			var $e = $entry.clone();
 			$e[0].board_id = board_id;
@@ -2260,7 +2309,7 @@
 
 			$index.append($e);
 			empty = false;
-		}
+		});
 
 		if (id_now) $export.show();
 		else        $export.hide();
@@ -2610,11 +2659,11 @@
 
 	$('.config .exp-board').click(function(){
 		var board = document.board;
-		var revision = localStorage.getItem('nullboard.board.' + board.id);
+		var revision = globalStorage.get('nullboard.board.' + board.id);
 		if (! revision)
 			return false;
 
-		var blob = localStorage.getItem('nullboard.board.' + board.id + '.' + revision);
+		var blob = globalStorage.get('nullboard.board.' + board.id + '.' + revision);
 		if (! blob)
 			return false;
 
@@ -2631,14 +2680,14 @@
 	$('.config .switch-theme').click(function() {
 		var $body = $('body');
 		$body.toggleClass('dark');
-		localStorage.setItem('nullboard.theme', $body.hasClass('dark') ? 'dark' : '');
+		globalStorage.set('nullboard.theme', $body.hasClass('dark') ? 'dark' : '');
 		return false;
 	});
 
 	$('.config .switch-fsize').click(function(){
 		var $body = $('body');
 		$body.toggleClass('z1');
-		localStorage.setItem('nullboard.fsize', $body.hasClass('z1') ? 'z1' : '');
+		globalStorage.set('nullboard.fsize', $body.hasClass('z1') ? 'z1' : '');
 		return false;
 	});
 
@@ -2765,14 +2814,14 @@
 	}
 
 	//
-	if (localStorage.getItem('nullboard.theme') == 'dark')
+	if (globalStorage.get('nullboard.theme') == 'dark')
 		$('body').addClass('dark');
 
-	if (localStorage.getItem('nullboard.fsize') == 'z1')
+	if (globalStorage.get('nullboard.fsize') == 'z1')
 		$('body').addClass('z1');
 
 	//
-	var board_id = localStorage.getItem('nullboard.last_board');
+	var board_id = globalStorage.get('nullboard.last_board');
 
 	if (board_id)
 		document.board = loadBoard(board_id);