diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 77afda4c991e4cc24db8fd12845f3ab593a04cfa..6e64db0bd9ca4831696cc0a95002ba48d30d909f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: registry.gitlab.tugraz.at/vpu/apps/signature/main:v1
+image: registry.gitlab.tugraz.at/vpu/apps/signature/main:v2
 
 before_script:
   - "sed -i 's|git@gitlab.tugraz.at:VPU|../..|g' .gitmodules"
diff --git a/.gitlab-ci/Dockerfile b/.gitlab-ci/Dockerfile
index ccdb25d64baed375a291ca563c4c23cb070e4fa3..74e3b53f10ad77844396968b47b4a1636ca982a3 100644
--- a/.gitlab-ci/Dockerfile
+++ b/.gitlab-ci/Dockerfile
@@ -3,6 +3,9 @@ FROM debian:buster
 ENV LANG C.UTF-8
 ENV DEBIAN_FRONTEND noninteractive
 
+# https://github.com/karma-runner/karma-firefox-launcher/issues/104
+ENV MOZ_FORCE_DISABLE_E10S true
+
 RUN apt-get update && apt-get install -y \
     git \
     curl \
diff --git a/.gitlab-ci/build.sh b/.gitlab-ci/build.sh
index 23c4a09e7aad737bbfd16f1d5c2aa86726fcaf49..a602fc30dc17125b9c3309a10b73b6417e74a940 100755
--- a/.gitlab-ci/build.sh
+++ b/.gitlab-ci/build.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -e
-TAG="registry.gitlab.tugraz.at/vpu/apps/signature/main:v1"
+TAG="registry.gitlab.tugraz.at/vpu/apps/signature/main:v2"
 sudo docker build --tag "${TAG}" --file "Dockerfile" .
 sudo docker run --rm --security-opt label=disable \
     --volume "$(pwd)/..:/home/user/app" --workdir "/home/user/app" \