Background them

Author: wu-hui

.github/workflows/integration_tests.yml

@@ -739,7 +739,7 @@ jobs:
         run: |
           curl -sL firebase.tools | bash
           firebase setup:emulators:firestore
-          firebase emulators:start
+          firebase emulators:start --only firestore &
       - name: Setup integration test deps
         run: |
           pip install -r scripts/gha/requirements.txt
@@ -813,7 +813,7 @@ jobs:
         run: |
           curl -sL firebase.tools | bash
           firebase setup:emulators:firestore
-          firebase emulators:start
+          firebase emulators:start --only firestore &
       - id: get-device-type
         run: |
           echo "::set-output name=device_type::$( python scripts/gha/print_matrix_configuration.py -d -k ${{ matrix.android_device }} )"
@@ -902,7 +902,7 @@ jobs:
         run: |
           curl -sL firebase.tools | bash
           firebase setup:emulators:firestore
-          firebase emulators:start
+          firebase emulators:start --only firestore &
       - id: get-device-type
         run: |
           echo "::set-output name=device_type::$( python scripts/gha/print_matrix_configuration.py -d -k ${{ matrix.ios_device }} )"
@@ -991,7 +991,7 @@ jobs:
         run: |
           curl -sL firebase.tools | bash
           firebase setup:emulators:firestore
-          firebase emulators:start
+          firebase emulators:start --only firestore &
       - name: Run tvOS integration tests on Simulator locally
         run: |
           python scripts/gha/test_simulator.py --testapp_dir testapps \