I've been using the script since you posted it, it's cooler than that of my browser. I noticed some issues though like

background display while trying to construct a post :

fix: i just made  td.windowbg2 to style the decendants of td with windowbg2 i.e just spacing it as in ' td .windowbg2'
the result
'
and
signature display. Height expands on mobile view and likely tablet view ,making other parts of the signature disfigured  esecially when you try to view profile.

fix: i just removed line 650, part of styling for the added 'processed' class ,


i don't know if you have any thread/ github repo for it but you can update it in the code you pasted here yourself if you approve it.