This bookmarklet lets you add bookmarks to Webtag in just a couple of clicks and it works in all major browsers. In desktop browsers, just drag and drop the below button to your bookmarks bar.
Add to Webtag

In mobile browsers, bookmark this page first and then edit the bookmark to add the below code as its URL

javascript:(`${encodeURIComponent(location.href)}&title=${encodeURIComponent(document.title)}`, '_blank', 'left=100,top=100,width=680,height=440'))()