The thing can be found in Settings | Applications | Manage Applications | All
==> HTML viewer
But I don't know if there is anything you can do to get it out of the way, or to configure it however. It looks like a piece of Android, at some level. Choosing to "Clear Data" does not activate any of the other options, such as "Launch by default", "Force stop", or "Uninstall" however.
Good spot. It supports something else I was thinking. It's a (Windows-type) file association thing. Android is treating the internal .htm and .html (I know, I renamed the file, just to see) suffixes as "files" rather than "web pages". So the associated app options are only "text viewers" rather than "web browsers".
Interesting. I wonder if this is Android or Archos?
Is there any kind of app which manages File Associations, I wonder?