Ok, I was able to configure a variant of Google search with query parameter "udm=14" after setting the Firefox config parameter browser.urlbar.update2.engineAliasRefresh = true. But now I'm apparently using an undocumented Firefox feature.
My use case:Google seems to provide a way to change its behavior to a "classical" search by adding the (somewhat magic) query parameter "udm=14". I'd like to add an URL template to my Firefox including that parameter (in addition to the standard Goo...
