diff --git a/.github/workflows/test-core-linux.yml b/.github/workflows/test-core-linux.yml
index 1a1a5bd4..95ee6338 100644
--- a/.github/workflows/test-core-linux.yml
+++ b/.github/workflows/test-core-linux.yml
@@ -22,17 +22,14 @@ jobs:
         with:
           python-version: "3.11"
           cache: "pip"
-      - name: Install Firefox and dependencies
+      - name: Install Firefox manually and dependencies
         run: |
-          sudo snap remove firefox
-          sudo add-apt-repository -y ppa:mozillateam/ppa
-          echo '
-            Package: *
-            Pin: release o=LP-PPA-mozillateam
-            Pin-Priority: 1001
-            ' | sudo tee /etc/apt/preferences.d/mozilla-firefox
           sudo apt update
-          sudo apt install -y firefox nodejs curl grep zip wget
+          sudo apt install --no-install-recommends -y nodejs tar wget curl grep libappindicator3-1 libasound2 libdbus-glib-1-2 libxtst6 libxt6
+          wget -O firefox-setup.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux64"
+          tar xjf firefox-setup.tar.bz2 -C /opt/
+          ln -s /opt/firefox/firefox /usr/bin/firefox
+          rm -f firefox-setup.tar.bz2
       - name: Download geckodriver
         uses: nick-fields/retry@v2
         with:
@@ -77,6 +74,7 @@ jobs:
           echo "SERVER_NAME=www.example.com" | sudo tee -a /etc/bunkerweb/variables.env
           echo "HTTP_PORT=80" | sudo tee -a /etc/bunkerweb/variables.env
           echo "HTTPS_PORT=443" | sudo tee -a /etc/bunkerweb/variables.env
+          echo 'DNS_RESOLVERS="9.9.9.9 8.8.8.8 8.8.4.4"' | sudo tee -a /etc/bunkerweb/variables.env
           echo "USE_BUNKERNET=no" | sudo tee -a /etc/bunkerweb/variables.env
           echo "USE_BLACKLIST=no" | sudo tee -a /etc/bunkerweb/variables.env
           sudo chown nginx:nginx /etc/bunkerweb/variables.env