User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:106.0) Gecko/20100101 Firefox/106.0

Steps to reproduce:

I'm using Kubuntu 22.10 (latest version, fully updated) and Firefox 106 distributed via snap.

1. I take a screenshot using Spectacle
2. I drag the image from Spectacle into Firefox (to upload it to a website, such as Slack, Google Drive, Facebook etc.)
3. The image is not uploaded. Nothing happens.

Actual results:

The image seems to be dragged: I see it's outline, the cursor has a (+) sign when hovering over Firefox with an upload drop zone. But when I release the mouse button, nothing happens.

Expected results:

The image should be uploaded to a website.

Spectacle hold images in the /tmp/ directory, maybe that's causing the issue?

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Can you try non-snap version, i.e. plain Mozilla binary?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Testing_Mozilla_binaries

If so, can you create a screencast of the issue?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Collect_information_for_a_bug_report

Thanks.

The issue does not occupying with non-snap version of Firefox. Do you still need a screencast?

(In reply to grzegorz from comment #3)

The issue does not occupying with non-snap version of Firefox. Do you still need a screencast?
No, Thanks.

Sounds very much like bug 1786533

https://github.com/flatpak/xdg-desktop-portal/blob/main/data/org.freedesktop.portal.FileTransfer.xml

The product::component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit auto_nag documentation.

I tried on Ubuntu 22.04, on Firefox 106RC and Firefox 107RC-build2, and I get the same result. This result is also encountered on Chrome.
When dragging a screenshot from Spectacle, an error page is displayed, notifying that the file is not accessible.
Note that if I drag&drop the file from the saved folder in Firefox, the screenshot is correctly displayed.
Am I missing some steps? Please let me know If I can help any further with the investigation.

The severity field is not set for this bug.
:gerard-majax, could you have a look please?

For more information, please visit auto_nag documentation.

I encounter the same issue when trying to drag&drop files from an ntfs drive mounted with fuseblk.

Kubuntu 22.04.2 LTS:
firefox 112.0.1-1
snap 2.58.3
snapd 2.58.3
series 16
ubuntu 22.04
kernel 5.15.0-70-generic