v0.3.2 -- no more auto-launching LibreWolf

Removes the automatic LibreWolf launch that ran after both --apply and --revert. Found by actually running the full uninstall sequence: --revert relaunched LibreWolf right after restoring the profile, meaning getting to sudo apt purge privacyfox next required closing LibreWolf again first -- the wrong default for a tool meant to be run and tested repeatedly.

Neither mode launches the browser now, in either direction -- you're in charge of opening and closing your own LibreWolf. The same fix was applied to install.sh (the direct, no-package install path).

Left untouched, deliberately: the brief headless launch-then-kill --apply uses to bootstrap a missing profile on a first-time install. That's not a real launch (nothing stays running, no window appears), and it's still needed -- otherwise there'd be nothing for --apply to write into.

Retested all three scenarios (apply/revert with an existing profile, apply with none) against a fake profile + a fake librewolf binary that logs its own invocations, confirming the exact launch behavior rather than just re-reading the code.

Rebuilt, lintian-clean.