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Installed FF yesterday to give it a try. Today I was on a trusted page when the download window popped up showing me what you see below. I was on a trusted website and there was nothing clicked to download and this wasn't expected. It's an executable file claiming to be from Zoom.com. I wasn't on their website either.

Is the legitimate, something that FF wanted to add to use Zoom from within the browser?

Installed FF yesterday to give it a try. Today I was on a trusted page when the download window popped up showing me what you see below. I was on a trusted website and there was nothing clicked to download and this wasn't expected. It's an executable file claiming to be from Zoom.com. I wasn't on their website either. Is the legitimate, something that FF wanted to add to use Zoom from within the browser?
Attached screenshots

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The site mentioned -- zoom.us -- sounds legit, but I don't know what that EXE is.

Zoom has an add-on for Firefox, I think it does something on your Gmail calendar, but I don't think it installs that way because add-ons are .xpi files, not .exe files.

Very strange.