With Chrome Version 65.0.3325.146 released late this week, the download method used by the Xbench Chrome Extensions has stopped working (it does not download anything).
To solve the issue, we have just updated the Xbench Chrome Extensions to use a different method to download files for QA.
However, the new download method requires that you accept an additional permission: Manage your downloads.
Therefore, next time the Chrome extensions are autoupdated, you will notice an orange warning saying that the extension has been disabled and that you need to accept the additional permission to re-enable the extension.
Once you accept the new permission the Chrome extensions will continue working as usual.