 However, when collecting references to LXR on the Internet, there is ambiguity between the tool itself and instances of LXR displaying indexed source code (since many sites use "LXR" in its original sense of "Linux Cross-Referencer").After adopting LXR to index the source code for the Mozilla Application Suite, Mozilla forked LXR to into MXR (the Mozilla Cross Reference).MXR was forked in order to meet the needs of Mozilla development, namely code navigation of a mixed C++ and JavaScript codebase.