This happens to me all the time: you have the address of where you need to be, e.g.

744 W Dana St
Mountain View, CA 94041

You want to paste that into a search bar so you can get a map, but, instead of being able to copy the whole thing, you have to copy and paste it line-by-line.

Sound familiar?

Lifehacker posted about a useful tweak for Firefox if you share this annoyance:

Type "about:config" in the location bar. In the "Filter" field type "singleline." You can set the value to 2 for editor.singleLine.pasteNewlines, which will allow pasting of multiple lines to input boxes.