Isn’t a file browser needed for browsing the saved documents and spreadsheets?
Not to mention that office suites (such as WPS, OpenOffice and LibreOffice) will inevitably pop up a file browser when the “Open” or “Save” buttons/menu items are clicked.
There are many factors at play here, some of which including:
That said, it depends on what you’re searching for. If you’re searching for knowledge that used to be at old websites, you can use Marginalia to search this specific type of websites (considering that they’re still online).