Do you know that you can filter the Project Files by the file type?  In the Project Files activity center, you can choose the file type that you are looking for by clicking the down arrow by All Project Files. After you select a file type filter, you can use the icon to find and select the next project folder containing the selected file type. Use the icon to find and select the previous project folder containing the selected file type.

Click the folder icon to move from folder to folder with files containing that type.