Double click on window's title to minimize not working on Mac?
It's working on my old macbook, but not working on the new one.
Both mac are running firefox esr v52.2.1 on sierra v10.12.6. The only difference I can find is the "last updated date" of the default theme. the working version is July 20, 2017, the not working one is June 28, 2017. I don't know how to update it. It shows "No updates found" when checking for updates.
Any ideas to solve this? thanks.
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