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

Steps to reproduce:

Using Ubuntu 22.04 and Mozilla Firefox 106.0.5
Make sure firefox is set to only open pdfs in browser (not download them), and to always let you choose a location to save files to
Open any pdf in browser, I used https://africau.edu/images/default/sample.pdf
Click ctrl+s
Navigate to a folder in which you'd like to save and click 'save'

Actual results:

It will open the save file window, that lets you choose a location to save in, and it will let me navigate to a directory to save the file
When I click the 'save' button, the whole save file window will be flashing and unresponsive.
This leads the entire firefox window to be unresponsive

Expected results:

It should behave the exact same as the download button (which does not give me this problem), allowing you to save the file, and then the save file window closes

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.

Snap issue I guess?

From the video, one can see many portal window getting opened. Looks like a dupe of bug 1774062.