firebase-tools: firestore emulator on wsl2 does not work, results in ERR_CONNECTION_REFUSED

[REQUIRED] Environment info

firebase-tools:8.4.1

Platform: wsl2 with Ubuntu-18.04

[REQUIRED] Test case

Start emulator firebase emulators:start --only firestore Navigate to http://127.0.0.1:4000/firestore Try to write in the database or simply check console

[REQUIRED] Steps to reproduce

Brand new project firebase init Select emulators and firestore firebase init to get firestore files firestore.rules firestore.indexes.json Follow test case above - go to url and write to database

[REQUIRED] Expected behavior

Should be able to write and read collection through emulator UI

[REQUIRED] Actual behavior

No changes are made to firestore, and receive error in console

xhrio.js:622 POST http://localhost:8080/google.firestore.v1.Firestore/Write/channel?database=projects%2Fmyproj%2Fdatabases%2F(default)&VER=8&RID=78563&CVER=22&X-HTTP-Session-Id=gsessionid&%24httpHeaders=Authorization%3ABearer%20owner%0D%0AX-Goog-Api-Client%3Agl-js%2F%20fire%2F7.14.3%0D%0A&zx=u51ejgj9v8vq&t=1 net::ERR_CONNECTION_REFUSED

firebase emulators:start --only firestore --debug
[2020-06-05T19:52:33.335Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[2020-06-05T19:52:33.336Z] > authorizing via signed-in user
i  emulators: Starting emulators: firestore {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: firestore"}}
[2020-06-05T19:52:33.350Z] [hub] writing locator at /tmp/hub-leotestproj2.json
[2020-06-05T19:52:33.372Z] Ignoring unsupported arg: projectId {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: projectId"}}
[2020-06-05T19:52:33.372Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: auto_download"}}
[2020-06-05T19:52:33.372Z] Starting Firestore Emulator with command {"binary":"java","args":["-Duser.language=en","-jar","/home/leo/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.4.jar","--host","localhost","--port",8080,"--rules","/home/leo/projects/practice/firebase-proj/firestore.rules"],"optionalArgs":["port","webchannel_port","host","rules","functions_emulator","seed_from_export"],"joinArgs":false} {"metadata":{"emulator":{"name":"firestore"},"message":"Starting Firestore Emulator with command {\"binary\":\"java\",\"args\":[\"-Duser.language=en\",\"-jar\",\"/home/leo/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.4.jar\",\"--host\",\"localhost\",\"--port\",8080,\"--rules\",\"/home/leo/projects/practice/firebase-proj/firestore.rules\"],\"optionalArgs\":[\"port\",\"webchannel_port\",\"host\",\"rules\",\"functions_emulator\",\"seed_from_export\"],\"joinArgs\":false}"}}
i  firestore: Firestore Emulator logging to firestore-debug.log {"metadata":{"emulator":{"name":"firestore"},"message":"Firestore Emulator logging to \u001b[1mfirestore-debug.log\u001b[22m"}}
[2020-06-05T19:52:33.966Z] API endpoint: http://localhost:8080 {"metadata":{"emulator":{"name":"firestore"},"message":"API endpoint: http://localhost:8080"}}
[2020-06-05T19:52:33.966Z] 
If you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:

   export FIRESTORE_EMULATOR_HOST=localhost:8080

Dev App Server is now running.

 {"metadata":{"emulator":{"name":"firestore"},"message":"\nIf you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:\n\n   export FIRESTORE_EMULATOR_HOST=localhost:8080\n\nDev App Server is now running.\n\n"}}
[2020-06-05T19:52:34.138Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: auto_download"}}
[2020-06-05T19:52:34.138Z] Ignoring unsupported arg: port {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: port"}}
[2020-06-05T19:52:34.138Z] Starting Emulator UI with command {"binary":"node","args":["/home/leo/.cache/firebase/emulators/ui-v1.0.0/server.bundle.js"],"optionalArgs":[],"joinArgs":false} {"metadata":{"emulator":{"name":"ui"},"message":"Starting Emulator UI with command {\"binary\":\"node\",\"args\":[\"/home/leo/.cache/firebase/emulators/ui-v1.0.0/server.bundle.js\"],\"optionalArgs\":[],\"joinArgs\":false}"}}
i  ui: Emulator UI logging to ui-debug.log {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI logging to \u001b[1mui-debug.log\u001b[22m"}}
[2020-06-05T19:52:34.254Z] Web / API server started at http://localhost:4000
 {"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at http://localhost:4000\n"}}

┌───────────────────────────────────────────────────────────────────────┐
│ ✔  All emulators ready! View status and logs at http://localhost:4000 │
└───────────────────────────────────────────────────────────────────────┘

┌───────────┬────────────────┬─────────────────────────────────┐
│ Emulator  │ Host:Port      │ View in Emulator UI             │
├───────────┼────────────────┼─────────────────────────────────┤
│ Firestore │ localhost:8080 │ http://localhost:4000/firestore │
└───────────┴────────────────┴─────────────────────────────────┘
  Other reserved ports: 4400, 4500

Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.

Note: I tried this on mac and it worked fine