Hi,
As per https://support.smartbear.com/testcomplete/docs/app-testing/web/general/considerations.html#chromium :
"For security reasons, Chrome and Edge refuse all extensions to inject code into their internal pages (about:*, chrome:*, edge:*). Because of that, internal pages, like the new tab page, the extension manager, the download manager, the history page and so on, are not accessible to TestComplete."
If you really need it, you may consider OCR (https://support.smartbear.com/testcomplete/docs/testing-with/object-identification/ocr/index.html) or image-based approach.
