This Chrome extension provides visual indicators for task submission status on the AtCoder webpage of task itself. It highlights tasks based on submission history: green for accepted, red for not accepted, and no change for unattempted tasks.

Check the Github repo.

A sample image that shows how it looks in reality.

Open to suggestions, if any.

Contributors: guava_sauce

UPD:

So I added the functionality to show the number of users solved the question and are there in standings.

And here is the link for the published extension. AtCoder