feature: Tab movement to different Browser instances

[dotWee]

Summary

Starting off with a use case:
Sometimes a tab is open in one browser (Chrome, Brave, etc) and it belongs in another (Safari, Edge).

Solving the via copy-pasting the tab url to another browser is easy, but AppleScript can this do too - I've used some hand-rolled AppleScript for most of the time: read the current tab URL, open it in the other browser, then close the original tab.

--Description: Move Safari tab to Google Chrome (and close original tab after)
tell application "Safari"
	--Variables
	set docText to ""
	
	--Select current tab
	set tabURL to URL of current tab of window 1
	
	--Append to variable
	set docText to docText & tabURL as string
	
	close current tab of window 1
end tell

tell application "Google Chrome"
	activate
	if (count of windows) is greater than 0 then
		set currentWindow to front window
	else
		make new window
		set currentWindow to front window
	end if
	
	make new tab at currentWindow with properties {URL:tabURL}
end tell

This PR builds that flow into Browserino. Trigger it from Move Current Tab... in the menu bar, or from a recordable global shortcut.

Browserino reads the frontmost (scriptable) browser’s current tab URL, shows the existing picker for the destination, opens the URL there, and closes the source tab only after that open succeeds.

Canceling the picker leaves the original tab alone. Shift / Shift+Return still opens the destination in private mode. Closing the source tab can be turned off under Preferences -> General -> Tab switching.

Short description how

The picker and NSWorkspace open path are unchanged. What is new is pulling a URL out of another app and optionally closing that tab.

1. Trigger — global shortcut snapshots the frontmost app at key-down, before Browserino activates. The menu item uses the last non-Browserino app plus on-screen window z-order, so clicking the status item does not steal the source.
2. Source — must be a browser in the configured Browsers list. If that front app is listed but not scriptable (e.g. Firefox), fail with an alert instead of silently using a browser behind it.
3. Read URL — Apple Events by bundle ID (tell application id "..."), not localized app names. Safari: URL of current tab of window 1. Chromium family: URL of active tab of window 1.
4. Picker — same UI, move mode: caption Moving from …, host-matched Apps hidden, source browser omitted, hidden browsers not offered. Empty destination list → alert, not an empty picker.
5. Open then close — destination still goes through Launch Services. The source tab is closed via Apple Events only in the open completion handler, and only if the close-source toggle is on.

Scriptable sources: Safari / Safari Technology Preview; Chrome, Brave, Edge (including Beta/Dev/Canary/Nightly variants); Opera, Opera GX, Vivaldi, Arc, Chromium.

Not moved: empty URLs and start pages, browsers with no windows, internal pages (about:, chrome:, edge:, brave:, safari:, opera:, vivaldi:, chrome-extension:, edge-extension:). Firefox and other non-scriptable apps are out of scope. Only the URL is transferred — not cookies, history, or session.

macOS asks for Automation permission the first time Browserino controls a source browser (read + close). Denied access shows an alert with a link to System Settings -> Privacy & Security -> Automation. Opening the destination still uses Launch Services, so the destination does not need Automation access.

Also documents the existing feature set and this flow in the README.

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Love the work on Browserino! Hope you know Browserino is even recommended by the fellow Browserosaurus creator :) Cheers and greets from Zurich!