Drag and drop not working correctly (Vivaldi and Firefox)

[msmafra]

Dragging and dropping a file from COSMIC Files pastes its path instead of dropping in the window with Firefox, and nothing happens with Vivaldi.

Fedora Workstation 40
NVIDIA drivers 550.78 (Hybrid mode with Intel i7 10750h)
COSMIC from ryanabx/cosmic-epoch COPR updated 07/05/2024

[WatchMkr]

Can you help expand on this?

If I drop a file into the Firefox URL bar, an image for example, the path present in the URL bar and the image shown. This is working as intended.

If I drop an image file into the Github issue it correctly uploads to Github.

[msmafra]

For example, here on Github, if I try to drag and drop an image to this form, it doesn't work as intended and instead of attaching the image it just pastes the path of the image.