Covered by Behat Tests.

1. Third party libraries check

1. Login as admin
2. Navigate to Site Admin > Development > Third party libraries
3. VERIFY that the below libs are not exist anymore:
   1. regenerator-runtime
   2. core-js-bundle
   3. mdn-polyfill
   4. url-polyfill

2. Testing the toast

1. Use Firefox browser
2. Open the Web developer tools > Console.
3. Login as admin
4. Set the Tiny Recordrtc audiobitrate to 24 kb/s
5. Navigate to the edit profile page
6. In the description, click the Record audio icon button on the toolbar
7. Click the Start recording button, and stop the recording at 01:59 countdown time.
8. Click the modal right away
9. VERIFY that there is no error in the console. 

Code verified against automated checks.

Checked MDL-76512 using repository: https://github.com/ziegenberg/moodle

• main (0 errors / 0 warnings) [branch: MDL-76512-remove-polyfills | CI Job]

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Built on: Fri Jun 13 12:41:23 UTC 2025

Launching automatic jobs for branch MDL-76512-remove-polyfills

• https://ci.moodle.org/view/Testing/job/DEV.02%20-%20Developer-requested%20PHPUnit/19066/ PHPUnit (sqlsrv / complete)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/65194/ Behat (NonJS - boost and classic / complete)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/65195/ Behat (Firefox - boost / complete)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/65196/ Behat (Firefox - classic / complete)
• https://ci.moodle.org/view/Testing/job/DEV.01%20-%20Developer-requested%20Behat/65197/ App tests (stable app version) / complete) --> unrelated (can be ignored)

Built on: Thu Apr 17 14:19:54 UTC 2025