My Style is a free Chrome extension developed by Karthik Viswanathan. It falls under the category of Browsers and is specifically listed as an Add-ons & Tools subcategory. With My Style, users are able to insert custom CSS into web pages, instantly see the visual results, and have that CSS persist for future visits.

The extension is designed for users who want to add their own touch to a website's design and make it aesthetically pleasing. After installing My Style, simply visit the desired website and press control + m. This will reveal a textarea to the right of the browser window where users can insert their custom CSS. The changes will be immediately visible on the page.

One of the convenient features of My Style is the ability to hold alt while clicking on an element to automatically append a selector for that element to the textarea editor. This saves time in finding the correct CSS selector through inspecting the element.

My Style works by inserting a textarea into the page and monitoring changes to its contents. It then updates a dynamically inserted style tag accordingly. The extension utilizes local storage to make CSS changes persistent, providing a simple yet effective solution.