Twitter is no stranger to trying out new features on its social networking platform, with recent news that it is in the process of testing and rolling out no less than 15 different ad units, at least some of which are already popping up for users. The latest news highlights a feature that focuses Twitter on the desktop experience: web notifications. In Twitter’s words, the feature will let you “receive notifications in your web browser.” The feature was noticed by a user in Holland, Michel Wester, who says it popped up on a test account he uses. It first appeared not as an active feature, but as a (currently-disabled) option in the settings on the account. He says that while the tab with the option disappeared earlier on Wednesday, the URL for the feature still works for him in Chrome and Firefox, but not other browsers.