[snap] Cannot open containing folder from a downloaded item if the default path is changed

[Trif Alex]

Note: This was filled on request. See https://bugzilla.mozilla.org/show_bug.cgi?id=1693302 for more information.

Affected versions

    Firefox snap 111.0
    Firefox snap 112.0b2
    Firefox snap 102.9.0esr

Tested platforms

    Affected platforms: Ubuntu 18.04
    Unaffected platforms: Ubuntu 20.04, Ubuntu 22.04

Steps to reproduce

    1. Install Firefox snap using: sudo snap install firefox --candidate.
    2. Open Firefox snap and change the default download folder from about:preferences.
    3. Download a random file e.g: https://www.thinkbroadband.com/download.
    4. Click on Show in folder button from the downloads panel.

Expected result

    The folder is opened as expected.

Actual result

    The folder is not opened.

Notes

   I cannot reproduce the issue with regular Firefox builds.