Troubleshoot wasm-bindgen CI tests with firefox

[insipx]

wasm-bindgen headless tests with firefox using geckodriver complete successfully locally. In GithubCI, chrome headless tests also complete successfully. Firefox tests fail with a glx crash seemingly related to X-Server on ubuntu:

It would be nice to run webassembly tests on multiple browser engines

link to failing github action

driver status: signal: 9 (SIGKILL)
driver stdout:
    1728079653616	geckodriver	INFO	Listening on 127.0.0.1:39405
    1728079653719	mozrunner::runner	INFO	Running command: MOZ_CRASHREPORTER="1" MOZ_CRASHREPORTER_NO_REPORT="1" MOZ_CRASHREPORTER_SHUTDOWN="1" MOZ_NO_REMOTE="1" "/usr/bin/firefox" "--marionette" "-headless" "-no-remote" "-profile" "/tmp/rust_mozprofileICQv1s"
    console.warn: services.settings: Ignoring preference override of remote settings server
    console.warn: services.settings: Allow by setting MOZ_REMOTE_SETTINGS_DEVTOOLS=1 in the environment
    [GFX1-]: glxtest: Unable to open a connection to the X server
    1728079653899	Marionette	INFO	Marionette enabled
    1728079654024	Marionette	INFO	Listening on port 39683
    Read port: 39683
    [GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt
    console.error: ({})
    1728079775034	Marionette	INFO	Stopped listening on port 39683

driver stderr:
    *** You are running in headless mode.

These are the lines to run firefox tests in CI (can be added to test-webassembly.yml workflow:

- name: test with firefox
        run: |
          cargo test --release --target=wasm32-unknown-unknown -p xmtp_mls -p xmtp_id -p xmtp_api_http -- \
            --skip xmtp_mls::subscriptions --skip xmtp_mls::groups::subscriptions \
            --skip xmtp_mls::storage::encrypted_store::group_message::tests::it_cannot_insert_message_without_group \
            --skip xmtp_mls::groups::tests::process_messages_abort_on_retryable_error \
            --skip  xmtp_mls::storage::encrypted_store::group::tests::test_find_groups \
            --skip xmtp_mls::storage::encrypted_store::group::tests::test_installations_last_checked_is_updated
        working-directory: ./
        env:
          GECKODRIVER: "geckodriver"