Application-specific key combination

I have the following simple combination that launches the calendar

`lalt - c : open -a "Calendar"`

and I am looking for a way to make it work only if I am in Firefox or Chrome browser.
Is this possible? Maybe it can be done through osascript?

No files, tests, or code entry points are named; the issue is a usage question about restricting a hotkey to Firefox or Chrome and possibly using osascript. Start by checking skhd's documented application-specific matching and scripting support, then determine whether the requested behavior is supported or needs a defined feature proposal.

Written by the indexing model from the issue text.