BrowserRouter: A macos application to route specific urls to a given Firefox container.

install-browser-router.sh

#!/bin/bash
set -e

APP_DIR="$HOME/Applications/BrowserRouter.app"

# Compile the AppleScript into an application
osacompile -o "$APP_DIR" << 'APPLESCRIPT'
use AppleScript version "2.4"
use scripting additions

property routingRules : {¬
  {"home.atlassian.com", "Work" }, ¬
  {"selvbetjening.dfo.no", "Work" } ¬
}
property fallbackContainer : "Personal"
property firefoxApp : "Firefox Developer Edition"

on open location theURL
	routeURL(theURL)
end open location

on open theItems
	repeat with anItem in theItems
		set itemStr to anItem as text
		if itemStr starts with "http" or itemStr starts with "https" then
			routeURL(itemStr)
		else
			try
				set itemStr to POSIX path of anItem
				routeURL(itemStr)
			end try
		end if
	end repeat
end open

on run
	display dialog ¬
		"BrowserRouter is running." & return & return & ¬
		"This app intercepts URLs and routes them to Firefox containers." & return & return & ¬
		"Set it as your default browser in:" & return & ¬
		"System Settings → Desktop & Dock → Default web browser" ¬
		buttons {"OK"} default button "OK" with title "BrowserRouter" with icon note
end run

on routeURL(theURL)
	set theURL to trimText(theURL)
	set targetContainer to fallbackContainer
	repeat with aRule in routingRules
		if theURL contains (item 1 of aRule) then
			set targetContainer to item 2 of aRule
			exit repeat
		end if
	end repeat
	log "BrowserRouter: " & theURL & " → Container: " & targetContainer
	set containerURL to "ext+container:name=" & urlEncode(targetContainer) & "&url=" & urlEncode(theURL)
	try
		do shell script "open -a " & quoted form of firefoxApp & " -- " & quoted form of containerURL
	on error errMsg
		display dialog "Error routing URL:" & return & errMsg & return & return & ¬
			"Opening directly instead." buttons {"Cancel", "Open Directly"} default button "Open Directly" with icon caution
		do shell script "open -a " & quoted form of firefoxApp & " -- " & quoted form of theURL
	end try
end routeURL

on urlEncode(theText)
	return do shell script "python3 -c 'import urllib.parse,sys; print(urllib.parse.quote(sys.argv[1], safe=\"\"))' " & quoted form of theText
end urlEncode

on trimText(theText)
	return do shell script "echo " & quoted form of theText & " | xargs"
end trimText
APPLESCRIPT

# Fix the Info.plist — osacompile doesn't add URL scheme handling
PLIST="$APP_DIR/Contents/Info.plist"
EXECUTABLE=$(/usr/libexec/PlistBuddy -c "Print :CFBundleExecutable" "$PLIST")

# Register http and https
/usr/libexec/PlistBuddy -c "Set :CFBundleIdentifier com.local.browserrouter" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes array" "$PLIST" 2>/dev/null || true
/usr/libexec/PlistBuddy -c "Delete :CFBundleURLTypes" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes array" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0 dict" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0:CFBundleURLName string 'HTTP URL'" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0:CFBundleTypeRole string Viewer" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0:CFBundleURLSchemes array" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0:CFBundleURLSchemes:0 string http" "$PLIST"
/usr/libexec/PlistBuddy -c "Add :CFBundleURLTypes:0:CFBundleURLSchemes:1 string https" "$PLIST"

# Clear quarantine and register as browser
xattr -cr "$APP_DIR"
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -f "$APP_DIR"

echo ""
echo "Run:"
echo "  chmod u+x install-browser-router.sh && ./install-browser-router.sh"
echo "Installed to: $APP_DIR"
echo "Executable: $EXECUTABLE"
echo "Bundle ID: $(/usr/libexec/PlistBuddy -c 'Print :CFBundleIdentifier' "$PLIST")"
echo ""
echo -e "Test with default browser:"
echo -e "  open https://github.com"
echo -e "  open https://selvbetjening.dfo.no"
echo -e "Test with this application:"
echo -e "  open -b com.local.browserrouter https://selvbetjening.dfo.no"
echo ""
echo "Then set as default browser in:"
echo "  System Settings → Desktop & Dock → Default web browser"