What is this online theme builder? The online theme builder is a simple theme maker tool for the people who are unfamiliar with the .json file. It provide a simple way to change images, choose colors and tints, preview and pack your browser theme online. What kind of images can I use? We recently support both png and jpg images. png images are recommended. Main features: - Upload your own image for theme background - Auto generate colors for toolbars, frames - Pack & download your theme in .crx or .zip format - Pack & save your theme on your Gdrive