Comment 170 for bug 66566

I don't see how removing shift-enter and ctrl-shift-enter is even remotely related to the original request of making ctrl-enter open URLs in a new tab. In addition, it breaks a preexisting functionality of having shift-enter automatically add www. .net and ctrl-shift-enter add www. .org.
Personally, if this feature were really necessary (in which case it should have been opened as a separate bug), I would rather have it moved to an unused combination. For example, Windows-enter could be "open in new window" and Windows-alt-enter for "open in new tab, but on the background".
Or, if it is really that important to have these shortcuts on shift and ctrl-shift, even despite of breaking preexisting behavior and getting a lot of users upset, at least make windows-enter and ctrl-windows-enter the new .net and .org shortcuts so that this functionality is not lost.
(Or going further: use alt for .com, windows for .net, and alt-windows for .org, so that ctrl is left for opening on a new tab, be it from the URL bar or from a link on the page; now THAT would solve the inconsistency issue the bug originally complained about.)

Ultimately, removing the shortcut for .net and .org but keeping it for .com somehow suggests that .net and .org sites are "less important" than .com ones. I could expect that from a browser developed by google.com or microsoft.com, but not from one developed by mozilla.org.