Unmask passwords - i.e. turn "*******" into "password" on login pages:
Drag this link to your bookmarks bar -> Unmask Password and click on that bookmark whenevr you want to turn those ***s into passwordy goodness.
Test it here:
Uncheck all checkboxes on a page - this doesn't always work>
Drag this to your bookmarks bar -> Uncheck boxes
Test it here: