Yes, I tried doing that. Here's what happened.
I followed the steps on here to create a new profile
http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_WindowsIn search box
firefox.exe -P
Click Create Profile button
Click Next
Typed vdh in the 'Enter new profile name' box
Click 'Finish'
Clear the "Use the selected profile without asking startup" box so that it is unchecked
click the 'Start Firefox' box
Added Video Downloadhelper 7.2.1
Clicked options button and confirmed Companion App was installed (VdhCoApp 1.1.3)
Clicked Appearance tab and unchecked Notify when processed Notification
Clicked blue save button
Clicked Behaviour tab and selected Companion Application from dropdown
Changed the Default download directory to C:\Users\Paul\Downloads
Unchecked "Use last download directory as default location
Clicked blue save button
Alternated between behaviour and appearance tabs to check settings are still there
Selected top right menu button with three vertical bars, and then Exit to close firefox
Opened firefox
vdh profile was selected
Clicked start firefox
Clicked ctrl-shift-a to open extensions add-on-manager
Clicked vdh options button
Confirmed appearance and behaviour options are still there (as expected)
Opened firefox options window
Clicked Privacy & Security
Changed History from
Firefox will Remember History
to
Firefox will Use custom settings for history
Unchecked the Accept cookies from websites
Closed Options window
Selected top right menu button with three vertical bars, and then Exit to close firefox
Will now see what has happened to the vdh settings
Opened firefox
vdh profile was selected
Clicked start firefox
Clicked ctrl-shift-a to open extensions add-on-manager
Clicked vdh options button
Appearance tab Notification box is checked (i.e. setting has been lost)
Behaviour tab all settings are back at defaults
Download processor is Ask
Default download directory is dwhelper
Remember last directory is checked
So all settings have been lost and gone back to defaults
From anuhea55's reply, it looks like they were also able to duplicate the settings being lost by unchecking the Accept cookies from Websites option.
Ideally I'd like to be able to leave browser cookies disabled, and still be able to use VDH with saved options.
Do you think this might able to be fixed?