WinCairo can't show Material Symbols icon font while AppleWin can show it. https://fonts.google.com/icons See also: Bug 201213 – [Win] Material icons font aren't shown because ligature doesn't work
With Safari's User-Agent, WinCairo MiniBrowser downloads woff2 font and it can show the icons. With the default User-Agent of WinCairo MiniBrowser, it gets a ttf font. It has to take the complex text code path for the font (bug#215318). Adding text-rendering:geometricPrecision CSS property is a easy hack to enable the complex text code path.
Fixed by 261394@main.