This page lists many useful links about OpenStreetMap, mainly SlippyMap-Applications, but also some hand-picked others.
Many of these links can be automatically extended with Longitude, Latitude and Zoom. You can provide those values by filling out the form with coordinates or an URL that contains coordinates or using URL-Parameters, so you can add the page to your bookmarks together with the coordinates.
The script tries to parse the URL or coordinates (like e.g. N 49° 12' 30" E 8° 30' 12") for the Longitude, Latitude and if possible the Zoom.
Below the form the parsed values will be displayed. Should those differ from the expected result, then the script probably doesn't yet support the URL or coordinates format.