This is a follow-on from issue #659 "CI: Sporadic failures in example-firefox" regarding warnings coming from the workflow .github/workflows/example-firefox.yml.

Describe the bugs

1. The v9 workflow fails to upload the screenshots collected during the test. The following warning is shown:
   "No files were found with the provided path: examples/firefox/cypress/screenshots. No artifacts will be uploaded.".
   See the Annotations warning from Run: 3643305659.

2. The logs from both v9 and v10 workflows show the message:
   "Warning: We failed processing this video."
   See the log from Job: 6151396651, select and expand "Firefox". Scroll down to line 114.

Expected behavior

1. Artifacts, which are the screenshots saved from the Cypress tests, from both v9 and v10 test should be uploaded.

2. There should be no video warning.

Suggested fix

1. In .github/workflows/example-firefox.yml for v9 change the artifacts upload path to examples/v9/firefox/cypress/screenshots so that it refers to the correct location where the screenshots to be uploaded are stored.

2. In .github/workflows/example-firefox.yml for v10 change the artifacts upload name to screenshots-in-firefox-v10 to avoid the artifacts from the v10 test being overwritten by results from the v9 test.

3. Since videos are not used in this example, disable videos to suppress the video-related warning. (For v9: add "video": false in cypress.json, for v10: add video: false in cypress.config.js.) This is a workaround for the known issue in Cypress: see Video functionality is not working on Firefox 93 and above cypress#18415. Videos are created by default, unless disabled, when Cypress is invoked with run - see Cypress documentation: Videos.

4. For ease of local testing add a .gitignore file into the examples/v9/firefox and the examples/v10/firefox to instruct git to ignore node_modules/, cypress/screenshots/ and cypress/videos/ since the contents of these directories should not be committed. Edit: resolved by PR Correct .gitignore for videos and screenshots created by running examples #677.