It's good to create link to automatically report errors or suggest improvements to UI.
It can be a small link normally but should be very noticeable when some error happened.
It should automatically fill the information needed in this context such as error message, browser version, username, article, filename, filesize, session id etc. Possibly some private information should be submitted to service that is not public. Something similar is mentioned here T111112: Make MediaViewer error reporting link useful or remove it
There are also JS tools that can make webpage screenshot to submit.
Examples of such service are present in Eclipse Mars
and Intellij Idea