Intermittent failure in the `doesn't jump when moving selection` text layer integration test

This integration test fails intermittently in GitHub Actions. The last occurrence is in https://github.com/mozilla/pdf.js/actions/runs/34987052012/job/104443907967:

Failures:
1) Text layer Text selection using selection carets doesn't jump when moving selection
  Message:
    ProtocolError: session.new timed out. Increase the 'protocolTimeout' setting in launch/connect calls for a higher timeout if needed.
  Stack:
        at <instance_members_initializer> (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/common/CallbackRegistry.js:108:14)
        at new Callback (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/common/CallbackRegistry.js:112:16)
        at CallbackRegistry.create (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/common/CallbackRegistry.js:27:26)
        at BidiConnection.send (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/bidi/Connection.js:72:32)
        at Session.from (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/bidi/core/Session.js:70:49)
        at BidiBrowser.create (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/bidi/Browser.js:89:43)
        at FirefoxLauncher.createBiDiBrowser (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/node/BrowserLauncher.js:310:39)
        at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
        at async FirefoxLauncher.launch (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/node/BrowserLauncher.js:143:27)
        at async PuppeteerNode.launch (file:///D:/a/pdf.js/pdf.js/node_modules/puppeteer-core/lib/puppeteer/node/PuppeteerNode.js:124:16)
        at async startBrowser (file:///D:/a/pdf.js/pdf.js/test/test.mjs:1122:19)
        at async UserContext.<anonymous> (file:///D:/a/pdf.js/pdf.js/test/integration/text_layer_spec.mjs:1271:19)

We should find out what's causing this and fix it because it seems to be the one of the last known intermittents we have left for the integration tests at the moment.

Start with test/integration/text_layer_spec.mjs at the failing test around line 1271, then read test/test.mjs around startBrowser at line 1122. Reproduce the GitHub Actions failure and trace the intermittent Puppeteer Firefox session.new timeout. Done means the test no longer intermittently fails in the integration-test runs.