Can I Use. Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.
HTML5Test. The HTML5 test score is an indication of how well your browser supports the upcoming HTML5 standard and related specifications.
CSS Testing. Checks how well your browser supports the CSS selectors from level 1 up to the upcoming level 4. The notation is about the CSS selectors.
How Browsers Work. Behind the scenes of modern web browsers work. Geared towards the advanced technical readers but for beginners some of the beginning sections and charts gives you an appreciation for how a web browser works.