Add missing Playwright deps and clear Firefox locks on start

Dockerfile

@@ -34,6 +34,9 @@ RUN apt-get update \
       libgdk-pixbuf-2.0-0 \
       libdbus-glib-1-2 \
       libxcursor1 \
+      libnss3 \
+      libnspr4 \
+      libgbm1 \
     && apt-get autoremove -y \
     && apt-get clean \
     && rm -rf \

docker-entrypoint.sh

@@ -15,6 +15,8 @@ rm -f /fgc/data/browser/SingletonLock 2>/dev/null || true
 # Firefox preferences are stored in $BROWSER_DIR/pref.js and can be overridden by a file user.js
 # Since this file has to be in the volume (data/browser), we can't do this in Dockerfile.
 mkdir -p /fgc/data/browser
+# clean up stale firefox locks that can trigger "already running"
+rm -f /fgc/data/browser/parent.lock /fgc/data/browser/lock /fgc/data/browser/.parentlock 2>/dev/null || true
 # fix for 'Incorrect response' after solving a captcha correctly - https://github.com/vogler/free-games-claimer/issues/261#issuecomment-1868385830
 # Only write the prefs file when the volume is writable (container runs as non-root).
 if [ -w /fgc/data/browser ] && { [ ! -e /fgc/data/browser/user.js ] || [ -w /fgc/data/browser/user.js ] || rm -f /fgc/data/browser/user.js 2>/dev/null; }; then