A+ FontSize Changer is a Chrome Extension and Edge Chromium add-on developed by jeffsbaker. This extension allows users to customize the font text size, font text color, background color, and font family on any web page. Unlike Chrome's default zoom function, A+ FontSize Changer actually changes the font size of each element individually, making it easier to read without zooming the entire page.

One of the standout features of A+ FontSize Changer is its ability to work on pages with dynamic content and iframes. It also provides keyboard shortcuts (ALT+ and ALT-) for quick font size adjustments. Additionally, users can change the text color and background color on a page, allowing for personalized reading experiences.

The extension also offers pro features such as the ability to create profiles to save text settings and color schemes for each website visited. It saves custom font type, text size, text color, and background color for each individual website.

Overall, A+ FontSize Changer is a useful tool for those who want more control over the font size, color, and background of web pages they visit.