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Firefox launches on wrong screen

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Firefox opens full screen on my main monitor, one of three, but not the last-opened and before resizing to its last-used location and size. This three-stage process happens in a instant, interfering with live activity on my main monitor besides being really annoying. Hasn't always behaved this way. Any suggestions?

Thanks, Mike

Firefox 144.0 64 bit

Firefox opens full screen on my main monitor, one of three, but not the last-opened and before resizing to its last-used location and size. This three-stage process happens in a instant, interfering with live activity on my main monitor besides being really annoying. Hasn't always behaved this way. Any suggestions? Thanks, Mike Firefox 144.0 64 bit
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