To install the bookmarklet, simply drag and drop this button (don't just click it) to your browser toolbar as indicated in yellow on the right side screenshot.
Right click on the Bookmarklet Button and Add to Favorites. Be sure to add it inside the "Links" folder.
Click "Yes" at the Security Alert. You have nothing to worry about, we are friendly.
Click "Add" in the Add To Favorites dialog box.
When you discover interesting content while browsing the web, just click on the bookmarklet, it will add the content to this website.