As an alternative to the inline diff block's dropdown, a js slider widget would be a killer feature.
This has been done before for wikipedia:
(warning: the greasemonkey script is out of date, so don't waste your time.)
Closed: outdated
3.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
Given the proximity of EOL for Drupal 7, marking this as won't fix. The likely final Drupal 7 release of diff has landed in https://www.drupal.org/project/diff/releases/7.x-3.5 → . If this is something still applicable to a more modern version of the module, feel free to re-open and post additional notes.