Bookmarklets can be a good substitute for browser extensions.

bookmarklets Here is my collection of Javascript bookmarklets. Sometimes they are better than extensions. Using the bookmarklets To install the bookmarklet, drag the link to your bookmarks bar (if your bookmarks bar isn’t showing, you’ll want to turn it on first). After the bookmarklet is on your bookmarks bar, you can use it by clicking on it. Capturing the page title and address of a website Copy Title & URL - from Erik’s Bookmarklets.