Andrew_Bond reported a discrepancy in the Composer upload icon between two sites running identical builds: one displayed a generic upload icon, while the other showed an image-specific icon. After NateDhaliwal suggested testing in safe mode, renato identified the cause as differences in the authorized_extensions site setting. Specifically, the site with the generic icon had non-image extensions enabled, whereas the site with the image icon only allowed image extensions. This behavior is determined by the code logic in the frontend uploads library. Andrew_Bond confirmed that resetting the authorized extensions to include only images resolved the issue and restored consistency across both sites.