tests/support/popupBoot.js recorded every interval the popup sets but left timeouts alone, so the two-second timer that clears a flash message could fire after cleanupPopup() had removed the page, throw "document is not defined", and fail whichever test file the jest worker had moved on to. Timeouts still run for real during a popup test; the helper now records each one until it fires or is cleared, and cleanupPopup() clears the ones still pending. The fake timers tests/firstWalletRefresh.test.js used to hold that timer are removed. tests/popupBoot.test.js shows a flash message, cleans up, waits past the flash duration, and fails if anything throws. Model: opus-5-5