collect the version numbers of browsers

bv.sh

#!/bin/zsh

APP_PATH="/Applications/"
INFO_PATH=".app/Contents/Info.plist"
browsers=("Safari Technology Preview" "Firefox Nightly" "Google Chrome Canary" "Safari" "Firefox" "Google Chrome" "Microsoft Edge Canary")

for browser_name in ${(@k)browsers}; do
  full_path="${APP_PATH}${browser_name}${INFO_PATH}" ;
  if test -f "$full_path"; then
    browser_version=$(defaults read "$full_path" CFBundleShortVersionString);
    echo "${browser_name} ${browser_version}";
  fi
done

The result will be something like:

Safari Technology Preview 15.4
Google Chrome Canary 104.0.5107.0
Firefox Nightly 103.0a1