MetaMaskOnboarding._detectBrowser() detects Chrome as Firefox

Hey,

The onboarding library is detecting the Chrome browser as Firefox.
This is causing the user to get redirected to Firefox AddOns URL: https://addons.mozilla.org/en-GB/firefox/addon/ether-metamask/

If the browser detection worked fine, it should ideally redirect the user to Chrome Web Store for the MetaMask Chrome Extension.

I'm using Chrome Version 101.0.4951.54 (Official Build) (arm64)
I'm using @metamask/onboarding package version 1.0.1
I'm using MacOS Monterey 12.3 (21E230)

PS: This issue appears to be on MacOS only. It works as expected on Windows 10 platform.

Start by locating MetaMaskOnboarding._detectBrowser() and reproduce the browser detection on Chrome 101 running on macOS Monterey. Verify that the fix identifies Chrome correctly and directs users to the Chrome Web Store instead of the Firefox Add-ons URL.

Written by the indexing model from the issue text.