Mozilla hits the century mark with the release of Firefox 100, adding support for YouTube HDR video for Mac users with an HDR-compatible screen. The Web browser improves its picture-in-picture capabilities, adding support for displaying captions and subtitles in YouTube, Prime Video, and Netflix videos, plus support for video captions that use WebVTT (Web Video Text Track) format. The release also improves Firefox spell checking to cover multiple languages, enables you to select preferred color themes for individual websites, and rasterizes fonts just once per window in macOS 11 Big Sur and later for faster opening of tabs. (Free, 121 MB, release notes, macOS 10.12+)
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