This script changes this UI behavior in Asana: if there are more than a few comments in a task, it hides many of them. To see them, you have to click a link that says "N more comments" where N is the number of hidden comments. Some people don't want comments to be hidden automatically, because they tend to get missed by someone scrolling through the comments to find the information they are looking for.

Also, long comments have a "See more" link that needs to be expanded.

This script automatically expands all comments and "See more" links. It displays a brief notification whenever these actions are taken.

This script works in the browser version of Asana, but not in the desktop version. If you want to guarantee that you don't end up in the desktop app, you can uninstall it. You may need to clear cookies to ensure that the web version doesn't try to open the desktop version.