编辑“How to Add a Stumble Upon Button to Chrome”

StumbleUpon was a social bookmarking and discovery engine that was discontinued in 2018. Therefore, it is no longer possible to add a StumbleUpon button to Chrome. However, you can use other social media sharing buttons instead, such as Reddit, Facebook, Twitter, and Pinterest.

To add a social media sharing button to Chrome, you can follow these general steps:

1. Install a social media sharing extension from the Chrome Web Store, such as "AddToAny Share" or "Shareaholic" (there are many other options available).
2. Open the Chrome menu by clicking the three-dot icon in the top-right corner of the browser window.
3. Select "More tools" and then "Extensions."
4. Find the social media sharing extension you just installed and click the "Details" button.
5. Make sure the extension is enabled, and then click the "Options" button if available.
6. Configure the settings for the extension, such as which social media buttons you want to appear and where they should be placed.
7. Save your changes and exit the extension options.
8. Browse to a web page you want to share and click the social media button you just added to Chrome.

Note that the exact steps and options may vary depending on the specific extension you choose.