Using this JavaScript trick you can edit a loaded webpage in your browser,though the changes don’t reflect on the original page.So try changing a WebPage using this trick.If you refresh the page, you will get back to the original page. Using this trick you can change image positions,button positions, change text,insert text in the loaded webpage.
Click on the images for a larger view.
Enter this code in the address bar and press enter.
javascript: document.body.contentEditable = 'true';
document.designMode = 'on'; void 0
Click anywhere in the webpage and you can start your work.
Via — Blogiseverything