Based on rufwoof's post in the FatDog64 Section, viewtopic.php?p=18301#p18301 and my follow-up thought that with a little tweaking it could run-as-spot and preserve the protection sanboxing provides, I did the tweaking.
To do that I stole two pages from Mike Walsh: (1) How he had structured the SFS google-chrome run-as-spot from /home; and (2) how he structured Brave-portable. Combining the two, then figuring out what went wrong --as dissenter has its own start-up wrapper-- resulted in dissenter64_RAS-1.5.114.sfs. Available from here, https://www.mediafire.com/file/jqitb1sd ... 4.sfs/file
Edit: Error not worth a revised upload. The included version of Mike Walsh's permission changer expects the existence of a folder /root/Downloads. Transfers from /home/spot/Downloads will not work without it. I forgot to include that folder. It may already be part of your system as, AFAIK, every 'regular' web-browser will create it --if it doesn't already exist-- the first time you download anything. By 'regular' I mean a web-browser not structured to run-as-spot. If the /root/Downloads folder is not already part of your system just file-browse to /root, Right-Click an empty space, select New>Directory from the pop-up window and give the folder the name Downloads.
Fortunately it plays Youtube videos with sound OOTB otherwise I probably would have gone-nuts/given-up and it wouldn't have been published. Runs under Bionicpup64 and Xenialpup64. I did not test under fossapup64 as 666philb has already made a version available via quickpet. I did test under LxPupSc64. That Puppy will need whatever libs are usually needed to get 'Ubuntu-built' web-browsers functional.
It passed my test for Spot but not rufwoof's*: When downloading it will expose folders and files outside of Spot; but denies permission to save anything outside of the /spot folder. Mike Walsh's permission-changer enabling a quick transfer of files from /spot/Downloads to /Downloads is built in. If your system already has this the first time dissenter is loaded a second icon of it will show up on the taskbar. Restart-x solves that.
Profiles are maintained in /home/spot/.config/GabAl and cache in /home/spot/.cache/GabAl. Keep in mind that with the entire application in /home a Save will be necessary to preserve any changes. Once you've configured it to your liking I suggest you delete its cache and execute a Save. I added three extensions: Adguard, privacy badger and a eraser. I know dissenter, itself, is supposed to handle the first two chores. But now I have 'someone watching the watcher'. By the time I had finished that configuration there were over 400 files in the cache folder. If I put dissenter to use in the future I'll have to remember to manually clear cache before executing a Save. I know the eraser is supposed to do that. It would be nice if that works.
* This a short, not entirely complete, exposition of the discussion on the 'Privacy is an illusion' thread. A hacker's tampering with your files may have become more difficult. But the information they contain can still be exposed.