Printables integration opens new instance of PrusaSlicer, downloads nothing, no errors shown.

[transplier]

Description of the bug

When I visit printables.com and attempt to download a file using the Open In PrusaSlicer button in Firefox, a new copy of PrusaSlicer opens (alongside the already-open instance), but nothing gets loaded into the plater.

Project file & How to reproduce

1. Enable the downloader feature in PrusaSlicer (Config->Preferences->Allow downloads from Printables.com->checked).
2. Perform desktop integration (Config->Desktop Integration->Perform).
3. Visit a model on printables.com. Example: https://www.printables.com/model/762688-sterilite-storage-bin-lid-clip/files
4. Click the PrusaSlicer integration on the page.

Expect: If PrusaSlicer is closed, a new instance opens up, downloads the model, and adds it to the plater. If PrusaSlicer is open, the existing instance downloads the model and adds it to the plater. Actual: A new copy of PrusaSlicer is always opened (even if one already exists), then nothing gets added to the plater. Nothing is added to the Downloads folder.

For reference this is a standard install of Firefox on Ubuntu using snap.

Checklist of files included above

• [ ] Project file
• [ ] Screenshot

Version of PrusaSlicer

Version 2.8.0+linux-x64-GTK3

Operating system

Distributor ID: Ubuntu Description: Ubuntu 24.04 LTS Release: 24.04 Codename: noble

Printer model

Prusa I3 Mk3

[rkiddy]

Do you use different profiles in Firefox? I have done this in the past and it causes problems with document launching, some of which the FF does not acknowledge as wrong.

[transplier]

Thanks. Just the single default profile, I'm afraid.