Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
if (mw.config.get('wgAction') == "history") { // Make sure we're on a History page. Otherwise, it's just stupid.
 
  // Grab default Watchers link and clone it
     var activeWatchLink = $("[href*='#mw-pageinfo-watchers']");
     var activeWatchLinkClone = activeWatchLink.clone(true);
 
  // Change original Watchers link display
     activeWatchLink.before("Number of watchers: ");
     activeWatchLink.text("All");
 
  // Set new Watchers link URL, text, and tooltip
     activeWatchLinkClone.attr('href', 'http://toolserver.org/~dispenser/cgi-bin/watcher.py?page=' + mw.config.get('wgPageName'));
     activeWatchLinkClone.text('Active');
     activeWatchLinkClone.attr('title', 'Check the number of users watching this page who have logged in within the last 30 days');
 
  // Place constructed link after the original Watchers link, add bullet
     activeWatchLinkClone.insertAfter(activeWatchLink);
     activeWatchLinkClone.before(' <b>/</b> ');
 
}