I Built a Font Inspector Chrome Extension That Actually Identifies Japanese Fonts

There is a specific frustration that every frontend developer knows: you open a Japanese website, see a beautiful typeface, open DevTools, and font-family gives you "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Meiryo", sans-serif . Which of those is actually rendering? The browser picks the first available font from the stack. DevTools tells you the declared stack, not the resolved font. For Latin scripts this is usually fine — most machines have similar system fonts. For Japanese, it matters a