Firefox does indeed come with hyphenation dictionaries for a bunch of languages, in order to support the CSS `hyphens` property: https://developer.mozilla.org/

Firefox does indeed come with hyphenation dictionaries for a bunch of languages, in order to support the CSS `hyphens` property: https://developer.mozilla.org/en-US/docs/Web/CSS/hyphens https://developer.mozilla.org/en-US/docs/Web/CSS/hyphens If you look at the language support tables at the bottom of the page, though, other browsers don't support nearly as many languages.