Firefox 44 supports unicode-range, which can limit font _download_ & use to range of chars you need the font for developer.mozilla.org/en-US/…

unicode-range - CSS: Cascading Style Sheets | MDN

The unicode-range CSS descriptor sets the specific range of characters to be used from a font defined using the @font-face at-rule and made available for use on the current page. If the page doesn't...

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Replying to @assaflavie
@AssafLavie Right, browser skips the font if the unicode-range doesn't include the character, both for starting the download & display

Feb 14, 2016 · 8:21 PM UTC