diff --git a/securedrop/dockerfiles/focal/python3/Dockerfile b/securedrop/dockerfiles/focal/python3/Dockerfile
index b040fc5f96..d875c7beec 100644
--- a/securedrop/dockerfiles/focal/python3/Dockerfile
+++ b/securedrop/dockerfiles/focal/python3/Dockerfile
@@ -21,8 +21,8 @@ RUN gem install sass -v 3.4.23
 # Current versions of the test browser software. Tor Browser is based
 # on a specific version of Firefox, noted in Help > About Tor Browser.
 # Ideally we'll keep those in sync.
-ENV FF_VERSION 78.6.1esr
-ENV GECKODRIVER_VERSION v0.28.0
+ENV FF_VERSION 78.10.0esr
+ENV GECKODRIVER_VERSION v0.29.1
 
 # Import Tor release signing key
 ENV TOR_RELEASE_KEY_FINGERPRINT "EF6E286DDA85EA2A4BA7DE684E2C6E8793298290"
diff --git a/securedrop/dockerfiles/xenial/python3/Dockerfile b/securedrop/dockerfiles/xenial/python3/Dockerfile
index 50e0a0feaf..397c5a77cf 100644
--- a/securedrop/dockerfiles/xenial/python3/Dockerfile
+++ b/securedrop/dockerfiles/xenial/python3/Dockerfile
@@ -21,8 +21,8 @@ RUN gem install sass -v 3.4.23
 # Current versions of the test browser software. Tor Browser is based
 # on a specific version of Firefox, noted in Help > About Tor Browser.
 # Ideally we'll keep those in sync.
-ENV FF_VERSION 78.6.1esr
-ENV GECKODRIVER_VERSION v0.28.0
+ENV FF_VERSION 78.10.0esr
+ENV GECKODRIVER_VERSION v0.29.1
 
 # Import Tor release signing key
 ENV TOR_RELEASE_KEY_FINGERPRINT "EF6E286DDA85EA2A4BA7DE684E2C6E8793298290"