Is Photo Collage safe?

Create photo collages in the browser and download them as PNG or JPEG files.

This extension lets you choose a collage layout, add images by browsing, dragging and dropping, pasting from the clipboard, or selecting multiple files, then save the finished collage to your computer. It includes options such as photo filters, color selection for borders and backgrounds, photo replacement and deletion, and a single-photo layout. The description states that photos are processed in the browser without accounts or server uploads.