Encourage user to set email in issue reporter

chrome/locale/en-US/sendReport.dtd

 <!ENTITY wizard.title                   "Issue reporter">
 <!ENTITY privacyPolicy.label            "Privacy policy">
 
 <!ENTITY dataCollector.heading          "Welcome to the issue reporter">
 <!ENTITY dataCollector.description      "Please wait a few moments while Adblock Plus gathers the required data.">
 
 <!-- Please keep typeSelector.heading short - it is shown in the progress bar, not much space there -->
 <!ENTITY typeSelector.heading           "Select issue type">
 
 <!ENTITY typeSelector.description       "
@@ skipping 147 matching lines @@
 
 <!-- Please keep commentPage.heading short - it is shown in the progress bar, not much space there -->
 <!ENTITY commentPage.heading          "Enter comment">
 
 <!ENTITY commentPage.description      "
   The text field below allows you to enter a comment to help us understand the issue.
   This step is optional but recommended if the problem isn't obvious.
   You can also review the report data before it is sent.
 ">
 
+<!ENTITY emailComment.label           "
+  We encourage you to enter a valid email address so that we can contact you if there are questions
+  about your report. It will also allow us to recognize your contributions and to prioritize them higher.
+">
 <!ENTITY comment.label                "Comment (optional):">
 <!ENTITY comment.accesskey            "C">
 <!ENTITY comment.lengthWarning        "The length of your comment exceeds 1000 characters. Only the first 1000 characters will be sent.">
-<!ENTITY email.label                  "Email for further inquiries (optional):">
+<!ENTITY email.label                  "Email:">
 <!ENTITY email.accesskey              "m">
+<!ENTITY anonymous.label              "Anonymous submission">
+<!ENTITY anonymous.accesskey          "a">
+<!ENTITY anonymity.warning            "We won't be able to come back to you and will likely prioritize the report lower.">
 
 <!ENTITY attachExtensions.label       "Attach a list of active extensions to the report in case add-on conflict is the cause of the problem">
 <!ENTITY attachExtensions.accesskey   "x">
 
 <!ENTITY sendButton.label             "Send report">
 <!ENTITY sendButton.accesskey         "n">
 
 <!ENTITY showData.label               "Show report data">
 <!ENTITY data.label                   "Report data:">
 <!ENTITY data.accesskey               "p">
 
 <!-- Please keep sendPage.heading short - it is shown in the progress bar, not much space there -->
 <!ENTITY sendPage.heading             "Send report">
 <!ENTITY sendPage.waitMessage         "Please wait while Adblock Plus is submitting your report.">
 <!ENTITY sendPage.confirmation        "Your report has been saved. You can access it at the following address:">
 <!ENTITY sendPage.knownIssue          "The issue you reported is probably already known. More information:">
 
 <!-- Note: the placeholder ?1? will be replaced by the error code -->
 <!ENTITY sendPage.errorMessage        "
   An attempt to send the report failed with error code &quot;?1?&quot;. Please ensure you are
   connected to the Internet and retry. If the problem persists please request
   assistance in the [link]Adblock Plus forum[/link].
 ">
 <!ENTITY sendPage.retry.label         "Send again">
 
 <!ENTITY copyLink.label               "Copy report link">
 <!ENTITY copyLink.accesskey           "C">