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Firefox update

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Even though Firefox tells me I'm up to date, when I try to play a video in Netflix or Amazon Prime, I get a prompt saying it can't show the program because my browser isn't the latest one, but it is.

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Even though Firefox tells me I'm up to date, when I try to play a video in Netflix or Amazon Prime, I get a prompt saying it can't show the program because my browser isn't the latest one, but it is. Help

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Your UserAgent Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:109.0) Gecko/20100101 Firefox/115.0

It is the latest Firefox you can run on macOS 10.14 as Firefox 116.0 to current Release requires macOS 10.15 or later to run. https://support.mozilla.org/en-US/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support