Firefox 103 addresses two particular issues for macOS, with a boost to overall performance, and specific improvements for high-refresh rate displays found on the 14- and 16-inch MacBook Pro.

49613 97108 000 lead FirefoxCurrently only the 14-inch MacBook Pro, and 16-inch MacBook Pro have ProMotion displays. But these can run at up to 120MHz, and previous versions of Firefox have not correctly rendered sites when the display was on its fastest refresh rate.Mozilla notes that the new Firefox 103.0 features “improved performance on high-refresh rate monitors (120Hz+).” It also has a more general improved, ” responsiveness on macOS during periods of high CPU load by switching to a modern lock API.”

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