Firefox Extensions: GreaseMonkey and Its Scripts

There is a useful extension in Firefox called GreaseMonkey. In Chinese, we commonly refer to it as "You Hou Zi" (Oil Monkey)! Let's take a look at what exactly "You Hou Zi" is:

GreaseMonkey is an extension for the web browser Mozilla Firefox. It allows users to install scripts that modify most HTML-based web pages directly on the user side, making them more convenient and easier to use. With Greasemonkey scripts always present in the browser, they automatically make modifications every time the target webpage opens, allowing users to consistently enjoy the convenience provided by these scripts.

Greasemonkey can add new features to webpages (for example, embedding price comparison functionality on Amazon), fix webpage errors, combine data from different webpages, or perform countless other functions. Well-written Greasemonkey scripts can even seamlessly integrate their output with the modified page, making it appear as if it were originally part of the webpage.