DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Line Code
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toolkit.jar:
  content/global/crashes.xhtml            (content/crashes.xhtml)
  content/global/crashes.js               (content/crashes.js)
  content/global/crash-submit-form.xhtml  (content/crash-submit-form.xhtml)