Firefox Temporary Downloads Save Location

Earlier, when I would want to a view a file, Firefox would prompt me the app to open the file in, and then save the file in the \AppData\Local\Temp folder, and open it. As the Temp folder would be cleared, the downloaded file disappeared, as expected.

Now, when I do it, the file is downloaded to the Downloads folder, and thus clogs up space forever. How can I restore performance so that temporary downloads always go to the temp folder?

Referring to figure below, which presents the popup when I download a file, how can I force Firefox to download the file to the Temp folder when I choose option 1: 'open with Word'

The environment variables for my PC point to the AppData\Local\Temp location, and hasn't been modified recently.

How can I restore performance so that temporary downloads always go to the temp folder?

Open Firefox (I am there now) and go to the 3 top right bars (Settings).

Open Settings, scroll down the right side of settings until you come to Downloads.

Change the download location to what you want. Restart Firefox and then test.

You can also enable the setting to have it Prompt you. That is useful.

However, there is just one download folder setting which will be used for both "permanent" and "temporary" files. That is why I always Prompt.