This extension works well as it adds the new functionality to set startpage as search engine.

But: On some (few) websites it creates problems mit web elements, like here:
stylight.de/Artikel/Hailo/Oeko-Trio-Plus-L-Tret-Muelltrenner-Freistehender-3-X-9-Liter-Dreifachmuelleimer-Aus-Stahlblech-Muelltrennsystem-Mit-Soft-Close-Deckel-3-Fach-Abfallt-Grau-Silber-Neutrals--55e31d98-b0da-59b1-a687-4c3e65a4be9f/
You just can't expand the "Product Details" anymore with having this addon enabled. Bugs like this really should be fixed.

add-on would be great if the more annoying then helfup "Escape Route feature" could be disabled.
blurring a site when pressing "esc" 3x but not reloading the site properly after that; closing tab when pressing "esc" 4x - that is not really what I need or expect from a privacy-/search engine-add-on.