I've updated firefox to the latest snap.
latest/stable: 101.0.1-1 2022-06-09 (1443) 170MB
When I try to upload a file to a website, it simply does not react: I click the website button, and nothing happens instead of showing the file selection window. It is a behavior happening on any website. Moreover, on websites offering the "drop the file here" area, I can smoothly drag-n-drop the file and make the upload. It is when there is the Upload button that it does not work. I have also tried the websites with chromium, and they perform regularly.
As the last step, I have also tried to start it in safe mode and even to refresh the installation (firefox --safe-mode -> refresh), but, alas, with no luck.
EDIT: It appears that downloads are also not working correctly.When dealing with PDF files, for example, if the default action is "Open in Firefox", then after the PDF is shown, nothing happens if I click on the small icon for downloading the file. If the default action is "Always ask", when I click on the link of the PDF file, the selection window appear and, if there I choose "Open in Firefox", the small icon for downloading the files triggers the download.
Any hints?