Open the desktop preview in another browser

[mmablom]

Is your feature request related to a problem? Please describe.
I work using 2 browsers; Firefox (system default) for all my normal browsing needs and Chrome for all Salesforce development. Opening metadata in the org through the org open command can be done in a different browser based on the browser parameter. When using that command I can always open Salesforce in Chrome. Currently this plugin always opens the URL in the default browser, which means I have to copy the URL each time.

Describe the solution you'd like
Add the same browser parameter from the org open command to the lightning dev app command.

Describe alternatives you've considered
Currently I copy-past the URL, which is fine if a bit tedious.

Additional context
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