Following last night Gerrit upgrade to 2.13.8 ( Thanks Evgheni! ), there are some nice updates worth mentioning:

(I really like the new 'blame' option on the diff screen... :) 

User Interface

• The UI can now be loaded in an iFrame by enabling gerrit.canLoadInIFrame in the site configuration.

Change Screen

• Issue 106: Allow to select merge commit's parent for diff base in change screen.

• Issue 3035: Allow to remove specific votes from a change, while leaving the reviewer on the change.

• Issue 3487: Use ‘Ctrl-Alt-e’ instead of ‘e’ to open edit mode.

Diff Screens

• Add all syntax highlighting available in CodeMirror.

• Improve search experience in diff screen.

  Ctrl-F, Ctrl-G and Shift-Ctrl-G now bind to the search dialog box provided by CodeMirror's search add-on. Enter and Shift-Enter navigate among the search results from the CodeMirror search, just like they do in a normal browser search. Esc now clears the search result.

  If the user sets Render to Slow in the diff preferences and the file is less than 4000 lines (huge), then Ctrl-F, Ctrl-G and Shift-Ctrl-G fall back to the browser search.

• Issue 2968: Allow to go back to change list by keyboard shortcut from diff screens.

• Blame annotations.

  By enabling change.allowBlame, blame annotations can be shown in the side-by-side diff screen gutter. Clicking the annotation opens the relevant change.

User Preferences

• Issue 989: New option to control email notifications.

  Users can now choose between ‘Enabled’, ‘Disabled’ and ‘CC Me on Comments I Write’.

• New option to control adding ‘Signed-off-by’ footer in commit message of new changes created online.

• New option to control auto-indent width in inline editor.

• Issue 890: New diff option to control whether to skip unchanged files when navigating to the previous or the next file.

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